workflow ‘PO Create Documents’ I want to set item attribute ‘Is Automatic Approval Allowed?

 

Business case: in iProc I want to use the function “I need a purchase order number immediately”. Also in the workflow ‘PO Create Documents’ I want to set item attribute ‘Is Automatic Approval Allowed?’ to ‘Y’ , then upon document creation, PO approval workflow is automatically launched.

However, for min-max material replenishment in the warehouse I run the requisition creation automatically but I do not want the workflow 'PO Create Documents' to launch the PO creation nor the PO approval.

How can I differentiate between these two types of transaction to allow the approval only when the requisition comes from iProc. Not from min-max or other types of requisition creation.