[Carlton]

This is an example of what you're looking for I guess.

pawn Код:

public OnPlayerRequestClass(playerid, classid) {
  switch(classid) {
     case 0: // Team [TM]
     {
       if(strfind(GetPlayerNameEx(playerid), "[TM]", false) != -1) {
          // This skin is useable
       }
       else {
          // Invalid clan, therefore can't use this skin for the class.
       }
         }
  }
  return 1;
}