Is It Possible to bind two views to a single grid?

For me it sounds, like you want to have two selectors for two different columns in the grid. If that is the case, then yes, you may have two selectors for two different columns. As an example you can look for plenty of forms of Acumatica, when one column selector has dependency from what is selected in another selector. For example Projects and project tasks forms.

Firstly i have created a action with a popup in Sales order screen. And i have added a selector for inventory, and we i select a record in inventory selector then it displays all the invoice items for that paticular inventory and paticular customer in the grid of sales order screen.  now i need to add another selector besides inventory selector to filter data by Alternate id for stock items,  i want to use the same grid to work for both the selectors,  is that possible?

@darylbowman , I have Created a popup with inventory id selector. when i select it, it pulls all the invoice for that paticular inventory and customer of the current Sales order screen. now i want to append the funtionality i.e i want to add anothe selector that displays all Alternate ids for the stock item and when i select it it should funtion in the same way that is display all the invoices for that inventory

@darylbowman , So You mean to say If we change the Condtion of Grid View then we can Acheive it?, Hear is my code, can you please look at it once and guide me

 public PXAction<SOOrder> InvFilter;
        [PXUIField(DisplayName = "Invoice Filter", Enabled = true)]
        [PXButton(CommitChanges = true)]
        public virtual IEnumerable invFilter(PXAdapter adapter)
        {

            var q = Invview.Select().Count;

            var k = Invview.AskExt();
            if (this.Invview.AskExt() == WebDialogResult.OK)
            {
                foreach (ARInvoice invoice in Invview.Select())

                {
                    if (invoice.Selected == true)
                    {

                            foreach (ARTran tran1 in PXSelect<ARTran, Where<ARTran.tranType, Equal<Current<ARInvoice.docType>>, And<ARTran.refNbr, Equal<Current<ARInvoice.refNbr>>>>>.Select(Base, invoice.RefNbr, invoice.DocType))
                            {

                             
                                SOLine oLine2 = PXSelect<SOLine, Where<SOLine.orderType, Equal<Required<ARTran.sOOrderType>>, And<SOLine.orderNbr, Equal<Required<ARTran.sOOrderNbr>>, And<SOLine.lineNbr, Equal<Required<ARTran.sOOrderLineNbr>>>>>>.Select(Base, tran1.SOOrderType, tran1.SOOrderNbr, tran1.SOOrderLineNbr);
                                SOLine line1 = PXSelect<SOLine, Where<SOLine.orderType, Equal<Required<SOLine.orderType>>, And<SOLine.orderNbr, Equal<Required<SOLine.orderNbr>>, And<SOLine.lineNbr, Equal<Required<SOLine.lineNbr>>>>>>.Select(Base, tran1.SOOrderType, tran1.SOOrderNbr, tran1.SOOrderLineNbr);

                                if (line1 != null)
                                {
                                    SOLine line = new SOLine();
                                    //line.OrderType = tran1.SOOrderType;
                                    //line.OrderNbr = tran1.SOOrderNbr;
                                    line.InventoryID = line1.InventoryID;
                                    //line.UOM = tran1.UOM;
                                    line.BranchID = line1.BranchID;
                                    line.OrderQty = line1.OrderQty;
                                    line.UOM = line1.UOM;
                                    line.InvoiceNbr = invoice.RefNbr;
                                    //line.SiteID = tran1.SiteID;
                                    //line.TranDesc = tran1.TranDesc;
                                    //line.CuryUnitPrice = tran1.CuryUnitPrice;
                                    Base.Transactions.Insert(line);

                                }

                             
                            }
                        

                    }
                }
            }

            return adapter.Get();

        #region Views

        public PXSelectJoin<ARInvoice, InnerJoin<ARTran, On<ARTran.tranType, Equal<ARInvoice.docType>, And<ARTran.refNbr, Equal<ARInvoice.refNbr>>>>,
    //InnerJoin<SOOrder, On<SOOrder.orderNbr, Equal<ARTran.sOOrderNbr>>>>,
    Where<ARInvoice.customerID, Equal<Current<SOOrder.customerID>>, And<ARTran.inventoryID, Equal<Current<TestInventory.inventoryId>>>>> Invview;
 public PXSelect<TestInventory, Where<TestInventory.inventoryId, Equal<Current<TestInventory.inventoryId>>>> Testinventory;
        public PXSelect<StockAlterId, Where<StockAlterId.alternateID, Equal<Current<StockAlterId.alternateID>>>> AlternateInvId;
        public PXSelectJoin<ARInvoice, InnerJoin<ARTran,On<ARTran.tranType,Equal<ARInvoice.docType>,And<ARTran.refNbr, Equal<ARInvoice.refNbr>>>,InnerJoin<INItemXRef, On<ARTran.inventoryID, Equal<INItemXRef.inventoryID>>>>, Where<ARInvoice.customerID, Equal<Current<SOOrder.customerID>>, And<ARTran.inventoryID, Equal<Current<StockAlterId.alternateID>>>>>InvoiceView;
        #endregion

Thank you @darylbowman ,it seems like it is Best Answer , i will check it and Respond