How to define Supplier Profile Change Request approval based on Business Unit.

Summary:

Hi, We have a requirement to define Supplier Profile Change Request approval based on Business Unit. On checking I realized this isn't possible. Is there any way I can create a DFF on Supplier Bank Accounts page visible on the SUpplier Portal, and in the LOV provide the BU name. When the Supplier will update his Bank Account details, he will have to populate that DFF with the BU name and the approval will be triggered accordingly.

Content (required): Is it possible to create a DFF at Supplier Portal Bank Account. And define Supplier Portal Change Request based on BU