no, an identifer wouldnt help you at all here, as the on input event is only trigered on input, not on msg send
Hammer is absolutly right about the common alias idea .. no point in placining a feature sugestion for an identifer that couldnt be used anyways as the command wouldnt triger the event. and the reason it doesnt triger the event is because an alias can easily be made to do all u want to do, infact you could put all your code into a msg alias and just have the on input event call your msg alias also :P make sence?
Cobra^