Multiple Copies of One Object

So, say I had an object. Currently, I have multiple copies of the same object, to save code.
However, when I tell the object to do an action (by changing a variable) sometimes one object does the action, and sometimes all of them do the action.

If I had multiple copies of this one object, would it still be possible to make their variables (and other information) separate?

Or is there a better way?
(Which there probably is, and I can't notice because I'm just being stupid. XD)

-Wolfking_Warrior

When an instance of an object is selected in the conditions, then the actions only affect this one.
When NO object is selected in the condition (meaning, the conditions are not related to this object), then all the objects are affected.