Yes it is!
var b:Boolean;
protected function rightMouseDown(e:MouseEvent):void {
b = true;
}
protected function rightMouseUp(e:MouseEvent):void {
b = false;
}
override public function setCurrentState(stateName:String, playTransition:Boolean = true):void {
if (!b) {
super.setCurrentState(stateName, playTransition);
} else {
super.setCurrentState(...);
}
}