Can Requisition and PO approval emails reside in the same email box ?

System is currently using email collaboration to process email approvals for requisition, and it is working fine. Approval workflow is currently not implemented for Purchase Order.

Now, there is a requirement to implement approval workflow for Purchase Order, and utilize the email collaboration as well.

Questions:

1.) Is the existing IB configuration like the node, messages for requisition also apply to PO?

2.) Can the requisition and purchase order approval emails share the same email box, and can EOAWEMC appengine be able to distinguish and process both requisition and PO approval emails?