Anyone can see it, but a template conditional in the 3 templates should do what you want to do. (postbit_stafftracker, threadbit_stafftracker, and showthread_stafftracker)
Edit: Add this to the start of those templates with something like this:
Code:
<if condition="is_member_of($bbuserinfo, array(5,6,7))">
Replace 5,6,7 with a comma seperated list of the usergroupids you want it to show to, and don't forget to add </if> at the end of each of the templates.