How to Restrict user State wise

Hi Experts,

              I want to restrict a user Sate wise in SAP.  Suppose a user working for ABC state - Below restriction need to be maintain -:

1 . He/She cannot create sales order of other state other than ABC State.

2. Even he cannot see other state customer from F4 ( search option ) .

3. Can we add State in Organization level for control user to access customer data of other state.

4. How we can maintain authorization object for state in SAP.

Thanks,

   Amit Sharma