I'm no expert, but I just set this up on my system and it works the way you want it to, I believe. Here's what I did:
1. Tools > Options > Library & Folders > Manage Library Fields
2. Add field called Audition with properties:
Data type: Integer
Edit type: Check
3. Go to a Panes view. The included Panes view is fine for this.
4. Right click on a Pane and select "add category". I added mine to the Left of the first pane so it would be the first thing you see and select based upon.
5. In the lower part of the Panes view, where the files are listed, right click on a column header and select Auditioned. That will place the Auditioned column in the view where you clicked. Drag it left or right if you want.
You should now have check boxes next to each song for Auditioned or not. Check them on and off at will. Up in the Panes at the top, you can select to show ones that have been auditioned, have NOT been auditioned, or both.
I think that's what you were asking for.
Enjoy,
Brian.