How to create value set for mapping sets with data category name and compare it category_id

Summary:

Requirement is to use mapping set to configure valid approvers for category and supplier in approval rules

Content (please ensure you mask any confidential information):

We are able to achieve it with ReqLine.category_id, ReqLine.Vendor_id, where in a value set is created with category ID and Vendor ID associated to PO Header attribute 1 and 2 .

If we create a value set with category name and pass ID column, in the mapping set category name only getting stored.

Is there a way we can compare category name or Supplier name, so that users can configure mapping data set with names instead of IDs