Almost every character can "ledge cancel" (called scarring i belive is what your referring to) but each move and character that can be scarred have varying degrees of difficulty.
If you want to learn how to do it, try seaching "wolf scarring tutorial" or something to that effect in youtube. Also check out the wolf character discussion page, find something about "wolf advanced techniques", or just ask in the q/a thread for wolf.
Then once you've read about it and seen examples of it, go into training mode and practice it for as long as it takes untill you can at least do it half the time you try. Keep it up and stay patient and you will master that tech....for wolf anyways.