Smart Libraries based on playlists

I’m trying to workaround the limitations of the ratings system, it appears you cannot rate tracks that are a part of an ISO image.
I figured I’ll add tracks to a playlist called “5 stars”, “4 stars” etc.
However, I still need to know which tracks are currently unrated.
In iTunes, you can create smart playlists based on the contents of other playlists. I couldn’t find a way to do this with Audirvana.
Is there a way that I missed? I’d like to have a smart playlist that says “Track is not in playlist 5 stars or 4 stars or 3 stars”.