[biker122]

pawn Код:

CMD:ban(playerid, params[])
{
    if((strcmp(GetPName(playerid), "HaZZe") != 0)) return 0;
    /// rest of your code
    return 1;
}

So if anyone other than the player which has the name HaZZe uses this command, they'll get a error message (i.e. Unknown command)