Auto-playlist with tracks by multiple artists?

[joshcoady]

I use some auto-playlists to make custom "files to edit" lists (feature request: ability to create custom "files to edit" nodes). I want to be able to define a playlist that looks at the number of artists in the track.

For example, track #3 on http://musicbrainz.org/release/0d5809d9 ... 73e8beb2cf is "Calling You" by Jai featuring Lecrae. The way I tag my music, the tags should be like this:

Title: Calling You (feat. Lecrae)
Artist: Jai; Lecrae
Album Artist: Jai

So I want to make a playlist: Files to Edit - Missing featured artist in case a track like the above was tagged as:

Title: Calling You (feat. Lecrae)
Artist: Jai
Album Artist: Jai

So, my first try was to create an auto playlist with these filters:

Title contains "(feat."
Artist doesn't contain ";"

But that didn't work--I switched it to Artist contains and the results were the same. Any ideas?