User vs Contributor comments RSS feed

Hi,

I like to follow the comments of of some Users and Contributors and for that I subscribe the RSS feed of the specific User/Contributor comments page.

Currently this is possible to do to Users, but not to Contributors.

Is there any way to subscribe Contributors comments via RSS?

I have also found that the same person can have a User and a Contributor page, with different URL's. From the User page I can subscribe comments via RSS but from the same person Contributor page I can not.

If there is a simply way to find the correspondente User number to the Contributor name, this could be an workaround to the problem.

Thank you.