I ned to create "pixellated" faces on videos. 

      Same effect you would see on "Cops" or other news type
      shows.

      I'm stymied how to do this with Premiere. Can I do it? AM I
      looking in the wrong areas?? I'm sorta new at using
      Premiere,
      and may just not be in the right spots. 

      Thanks

You can do this in Premiere, although After Effects does
      give more control.  But you need to use Track Matte, not
      Image Matte, if any movement of the mask is required. 
      Garbage Mattes using the corners of the page peel window in
      transparency are limited to four corner points linked by
      straight lines and are not readily changed with time, so they
      are not really suitable for this application - more for
      split screen work.

      Put a second copy of the face clip on a higher superimpose
      track, apply a suitable pixelating filter of your choice,
      select track matte transparency, and put a suitable mask
      shape to cover the face on the next higher track.  Animate
      the mask as required using motion to track the face.