I'm replying primarily because I have this need, too. We use a custom
field w/ a pick list of "special tasks", but same concept. A couple
notes from digging I've done: I think EXISTS will solve this, but I
haven't had time to actually work through building it out. Here's the
link to the documentation I previously was pointed to:
https://experienceleague.adobe.com/docs/workfront/using/reporting/reports/text-mode/create-complex-text-mode-filters-using-exists-statements.html
My current workaround i...