Need different approval flow for Supplier initiated vs requester initiated work confirmation

Summary: The work confirmation can be initiated through the requester (internal user) or by the supplier through supplier portal. Currently we can setup the approval rules based on various attributes as mentioned in the doc ( )

What we are looking for is a way too have different approvals based on who initiates the work confirmation.

Eg: If an internal user creates the WC, Then the approval will be one level to the line manager.

If supplier initiates the work confirmation, then the approval should be 2 levels, Eg: Requester → requester line manager or buyer→ buyer line manager.

I looked at the attributes and i dont see any way to achieve this. I see a column in the PO_WC_HEADERS table CREATED_BY_ROLE which has the values such as requester, buyer, supplier etc. But I do not see this when configuring the approval rules.