How to Restrict Single Pay group while making payment through PPR with $ amount

Summary:
Business has particular requirement is that they have to pay to only if amount more than $25 in any method like Check and ACH to Particular Pay Group. For that we have established User defined rules With Payment Amount. Which is working for all pay groups (Business has 5 Pay groups).

But business wants to pay even $1 for other 4 groups.

1) How can we restrict that rule apply to only one Pay Group?

2)Can someone provide guidance on achieving this requirement?

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