Regular members may or may not be able to track BF%
I don't think regular members can. From what I can see, only body measurements can be tracked.
This should not stop anyone from wanting to track their own BF % however. There are calipers, available for cheap, that will help you determine BF. Then it's an easy matter of recording the information yourself.
Here's a calculator I found that will help you determine Body Fat % and Lean Body Mass: