[TSAdmin]

It wouldn't be hard to script a mute function locally for the server. A clientside timeout/loop for players in the same level as you referencing an array (likely in a client. string) of people who's chat should not be seen on your screen, but again- that'd be scripted locally and obviously wouldn't be a built-in feature of the game.

I am pretty sure I saw something similar in the works on Era a while back, and again recently, but I am not sure what ever came of that or why it was never used. I think it was one of Crow's works before he quit. You could use commands like /mute Add Account, /mute Remove Account, and /muteList. Simple stuff.