No, the filter only hides skills that are at level 0 and have no training. So it's really not helpful in this case. There's no way to distinguish between skills you haven't found yet and skills that aren't implemented yet. Also you may have some points in unimplemented skills from character creation, and these would show up in the filter no matter what.
Also I'm pretty sure there are some skills that you can receive training for but cannot practice (I think body development is one and maybe lockpicking?)
Anyway I agree with the OP. Hiding or marking these skills would be really helpful.