[Sum41Freeeeek]

PHP Code:

//#CLIENTSIDE
function onCreated() { this.allowed = {"account1","account2"}; }
function onActionGrab() //can use function onPlayerTouchsMe if you need to
{
  if (player.account in this.allowed)
  {
    hide;
    sleep(2);
    show;
  }
} 


should work.