Adhoc Payment approval to restrict the some BU's

Summary:

We have 5 BU's (BU 1, BU2, BU 3, BU 4 and BU 5) and business want to use Adhoc payment approval functionality for BU1, BU2 and BU 4 so, for the same we configured approval such as BU contains BU1, BU2 and BU3, but if the user processes the Adhoc payment in BU4 also going for self-approval means who is creating the adhoc payment that person only approval required, so BU4 and BU 5 is not required any adhoc and approval.

Content (required):

How to disable adhoc functionality at the same time approval should not trigger for BU4 and BU5.

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