Ability to Drive to Department Segment in Cost Accounting Based Off Employee Charge Account From PO?

Summary:

My client wants to drive to the Department Account Segment in Cost Management based off the PO Requester's corresponding department code they are assigned to (i.e., Employee Charge Account). I do not see any clean way to accomplish this in the Cost Accounting SLA - are there any suggested workarounds or alternative solutions to meet this requirement?

Content:

My client uses TAB accounting rules to derive a Department segment on the PO Account Combination in Purchasing. The logic of their Department rule is as follows: the Department account will drive to the PO requester's corresponding Department code (i.e., Employee Charge Account).