Dec 14, 2016
"mCensor plugin is a maximally simplified, yet tremendously powerful tool for creating and tracking censorship masks in FCPX. With just a few simple steps you can set up and track the censoring effect that will follow your target perfectly. Technology powered by Mocha® ensures that the tracking process is fast, precise and reliable, so working with the masks is nothing but pleasant."
You can purchase mCensor for only $59 from motionVFX.com; https://www.motionvfx.com/mplugs-105.html.