[TheChaoz]

usa un array. algo asi:

pawn Код:

new Usado[MAX_PLAYERS];

public OnPlayerConnect(playerid)
{
  Usado[playerid] = 0;
  return 1;
}

public OnPlayerCommandText(playerid, cmdtext[])
{
  if(strcmp(cmdtext, "/micomando", true) == 0){
    if(Usado[playerid] == 0){
      //codigo del comando
      return Usado[playerid]++;
    }
    else return SendClientMessage(playerid, color, "mensaje");
  }
  return 0;
}

espero que te sirva