It does (as of X3 at least).

brconflict
Sonar still doesn't use the channeling supported by Waves, such as side-chaining, I believe. One of the last DAW's to put it off, maybe? I advocate better Waves support here.  +1

 
gotta use the VST3 version and it works fine.

My work-round is to use parallel compression in conjunction with the eq.

Duplicate the bass track and put a compressor sidechained to the kick (or any audio as relevant) on one track. If desired output both tracks to a bus for convenience.

Playback both tracks and have a listen. Cut the bass as seems required in the track without the comp and everything else as seems required in the track with the comp.

Not ideal, and a side-chain into a single band on a multiband might work quicker and better, though there still might be the need to handle unwanted side-effects in the frequency band above the one being compressed.

thanks that's a clever tip! But yeah I'll just get the Fabfilter plug since it's more straight farward and can do a ton of other trick so it's well worth having!

Dyonight
thanks that's a clever tip! But yeah I'll just get the Fabfilter plug since it's more straight farward and can do a ton of other trick so it's well worth having!

The Fab Filter MultiBand is a sweet plugin.  You won't be sorry you got it.  I've been amazed at some of the results I've gotten with it.