List user-specific comments

I’m setting up a multi author site running on a sinlge installation of WP 2.5.1

Only authenticated users will have the ability to leave comments on the site.

I’m looking for a way of displaying a list of user specific comments. So for example Joe Bloggs signs up for an account, becomes a contributor and posts 5 different comments on 5 different posts. On Joe Blog’s author page we can see a list of all his comments.

I’ve looked high and low for an existing plugin but nothing transpired. Does anyone have any idea how to achieve this? Is there a WP function for this? Does anyone know of a relevant plugin?

Any help would be most appreciated indeed.

Thanks very much.