Is it possible to restrict the preparer to receive his / her own PR only?

Summary:

Both user A and B are preparers.

User A raise a PR #1 under Hong Kong BU. User B raise a PR #2 under Hong Kong BU.

Currently user A and B can both perform receipt for PR#1 and PR#2. How to avoid this scenario?

Expected: A can only receive for PR #1. B can only receive for PR #2.

Is changing to "Requester" the only possible way?

We put them as preparer given they could assign other users as requester as well.

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