Different domain = different forum id and style

[Cubevisions]

Hello,

In my website, i have some different pages for every "main" subject of it. For example:

articles.programmingwebsite.com
downloads.programmingwebsite.com
source.programmingwebsite.com

I have a forum installed at www.programmingwebsite.com/forums/ and i have the following categories:

Articles
Downloads
Source

Each one with various sub-categories. So, what i'm planning to do is, provide a link to my visitors like this:

articles.programmingwebsite.com/forums
downloads.programmingwebsite.com/forums
source.programmingwebsite.com/forums

And that would automatically redirect them to my forum related category with a different style. Is that possible? Also, can i HIDE those forums from anyone viewing the main forum (www.programmingwebsite.com/forums), making them only visible by users visiting them by the correct url created? (eg.: articles.programmingwebsite.com/forums
downloads.programmingwebsite.com/forums
source.programmingwebsite.com/forums)