textmode for filtering custom forms in project report

I would like to filter out projects that DO NOT have a specific custom form attached + that DO have other specific forms attached. We're able to easily collect one at a time but we cannot combine the two filters, does anyone have any suggestions on how we could achieve that? 

Almost all of our projects have around 5 custom forms attached, not in any particular order unfortunately.

For example, we would like to have a report showing what projects have our 'internal reporting form' but are missing the 'audit form'.

Any suggestions are appreciated!