Example, pin 6 of U109 can be selected with:
IsPad AND (Name = 'U109-6')
This is less general than the Pad Class method ajb suggested. If U109 number ever gets changed by annotation, the above rule will break (or, worse yet, be applied erroneously to another component).
I'm not sure offhand under what conditions a Pad Class will become forgotten (updating a component from library? changing footprint?), but it has limitations as well. Be vigilant.
Tim