Overriding Default Restriction groups in Customer Class screen

Hello Community,

I was wondering if we can override the Default restriction groups in Customer Classes form. The requirement is:

1. Each new customer is automatically placed in the "all customers" access group and is automatically checked off.
   2. When a sales opportunity is assigned to a responsible person, that the customer stored there automatically gets into the restriction group of the user/employee linked to the responsible person and is also activated.