Same routing purchase requisition

Hi all,

         I have a requirement as :

One group (Contain many position) but in one cost center (Example 1100) when create purchase requisition it will go through the approval process 1 

Second group (Contain many position)  but in one cost center (Example 1200) when create purchase requisition it will go through the approval process 2 

       Condition I use now in AME is TRANSACTION_REQUESTOR_POSITION_ID which can set up only each position.

Can you please advise what condition to help me set up according to above requirement? Because I use TRANSACTION_REQUESTOR_POSITION_ID that make me have a load of work to set up because I have to set one by one position.