Doing it for one row is easy, and can appear instant by using filter conditions to hide the row once it’s flagged.
Doing it for all rows belonging to the same user is a little trickier, but I believe it should be possible. I’m thinking that you’d need to use some combination of user specific columns with some funky rollup/ITE columns such that if one row gets flagged, then they all get flagged (and hidden). I can’t immediately think how to do this, but I “feel” like it should be possible. @ThinhDinh @Jeff_Hager any ideas?
Edit: Actually, you may be able to adapt the technique that @Robert_Petitto demonstrates in this post.