How to Restrict purchase order view / Edit access within same Business unit to buyers

Summary:

There is need to restrict buyers to view and edit certain purchase orders within same Procurement BU but diff Req BU

Content (please ensure you mask any confidential information):

Multiple req BU pointing to single Procurement BU

Version (include the version you are using, if applicable):

25A

Code Snippet (add any code snippets that support your topic, if applicable):