User specific RSS Feed

Hi,

On our board, there are many Topics that can only be viewed by specific groups or members. Because of that, they do not show up on the RSS feed. However, the Forum doesn't recognize the standart User authentification to get all the viewable Topics as an RSS feed:

http://username:password@forum.forumotion.com/rss/? -> doesn't work

How can I see all the Topics I have a permission to see in the Feed, or how can specify a Username and Password for the RSS feed.
I tried it with RSS and Atom.

Is there another way or another URL I can try it with?

Thanks for your Help.

* Bump *

I would dearly love to know how to do this as we have a lot of restricted forums (for privacy) and the rss only feeds the public access forums. It would be great to have the function available on the forum.

Please help!

Cas

Does anyone have any idea?? Please?

cas