Title says all. As of now, the search/tag cheatsheet shows that searching images by locked notes and rating, notelocked:true/notelocked:false and ratinglocked:true/ratinglocked:false respectively, is possible and works fine. Attempting to use a similar format to look for posts with locked tags (taglocked) fails to work.

Is it possible to do so? Or is this just not possible as of now? Thank you in advance.