Conditional Smart folder actions

You need to do it slightly different. You need a mailbox (or smart mailbox based on some condition, e.g., a tag) which is essentially your list of emails representing the category. Let's name it “Promotion Senders”. Then create a smart mailbox (or rule if needed for that) with a condition like this:

From > Address “is in” “Promotion Senders” From > Address

This is a very flexible type of condition where the value of one header can be compared with a specific header of all emails in a different mailbox.

I hope that makes sense.