Column to show mags. that are NOT in any virtual Libraries

Hi,

I have a large collection of magazines.
I created several virtual libraries with search expressions to classify them.

I would like to create a custom column to show all the magazines that have NOT been included in any virtual libraries.This way I can add the search expressions to the appropriate virtual library.

Anybody know how to do that?

Please bear in mind that I am a beginner at Calibre. Thanks!