Charge account basis in iprocurement and modification

Hi
The charge account is picked fro the account defined in HR or Expense account rules as specified.

We have a 7 segment account structure where in unit and location are 2 segment.

Is it possible to have charge account selected on the basis of the ship to location entered in the PO

For example if the ship to location is X the the charge account = charge account with segment values for x

This will avoid manual modification of  entries.

We have a centralized purchasing system

Thanks
Ninad