Regarding specifics, CComments should have a new drop down list option for both the user link and avatar for when comments are made. If you were willing to go further with this, a EasySocial app could be made to display profile comments (comments the user has made on articles and such) and possibly show comment activity in the stream.

If it would help, I could get Mark (the lead developer) involved. He was able to work with the Kunena folks to get something worked out for a plugin/app as seen here.