Project and task associated with warehouse locations

I have a client with numerous warehouses and they need the flexibility to receive items into locations associated with Projects in multiple warehouses. They want to be able to associate a warehouse location with a project in multiple warehouses but leave the task blank for flexibility on the receipt transaction (items sometimes are diverted to different warehouses than indicated on the PO). It does not seem possible to have a project associated with a location in multiple warehouses without a task. What am I missing?