That, or callMultiboardDisplay(mb,GetLocalPlayer() == desiredplayer) will show the board to 'desiredplayer'. This one would hide it for everyone else if it's shown for them, pipe's would just show to one person. Choose whichever you need.
Right now I have a statistics multiboard which is toggleable for each player whenever they type something, right now it's colliding with the other multiboard making it disfunctional.