Anonymous/Nonymous Communication Coexisting?

[yancm at sdf.lonestar.org]

OK, this is probably a duuumb question, but...

Is it possible to have a single application, such as a web browser
or a p2p client behave normally with normal url's but use
tor if the url is an xyz.onion address? Or is it everything
or nothing?

If I should have been able to find this, I apologize...I looked
around in the docs and help before writing this note...didn't
see anything that looked useful.

--gene