[Twistedz]

Код:

public OnPlayerEnterVehicle(playerid, vehicleid, ispassenger)
{
        new seat = GetPlayerVehicleSeat(playerid);
	if(vehicleid == /*id of the vehicle here*/);
	  {
	  if(pInfo[playerid][Job] == "Pizza boy"); //or if you have it with numbers, change it to your variable.
		{
		// your stuff here...
		}
	  else
		{
                if(seat == 0)
                  {
		  SendClientMessage(playerid,/*color*/,/*error text*/);
		  RemovePlayerFromVehicle(playerid);
                  }
		}
	  }
	return 1;
}

Change the variables with yours.