How to match filters to moving object using motion tracking ?

Hi:)
Excuse me for imperfect english.
I'd like to perform the famous face wrao effect that I've seen in a tutorial for ADOBE AE.
I've to match move a filter (like distortion-bulge) o a moving object using motion tracking, but i've nit able to perform it.
(I want to distort an eye in a face that moves it)
THanks

Specialcase gives an excellent tutorial here:
http://motionsmarts.com/tutorials/matchmove1/mm1.html
Patrick

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How to match filters to moving object using motion tracking ?

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