Ok, now im going to explain how to do it from what i "THINK" your asking.
Now first what you want to do is set up a CUSTOM leaderboard. Then, just for looks, disable computer in leaderboard.
Now, when the player accomplishes what you want, under actions put Add 1 custom. This way you can make him be able to do anything to accumulate the X/Y instead of using one of the starcraft presets such as Kills, Greed, Etc.
I hope this is what you meant, see'ing as its my first actual post on SEN, i dont want to start with a rep for being stupid

-LiViD