Restrict Requester LOV in Invoice Creation

Summary:

We need to restrict the Requester LOV (List of Values) during invoice creation to display only specific users. We are seeking a solution to achieve this, preferably using roles or another effective method.

 we found a document in the Customer Cloud shared by the Self Service Procurement.

Below is the Customer Cloud link where we found the document:
https://community.oracle.com/customerconnect/discussion/67158/how-to-restrict-requesters-in-the-requester-lov

However, the document pertains to multiple business units. We have followed up with the product manager and confirmed that it will not work at the invoice level. Any additional input would be helpful.