Restrict Internet Access

Does anyone know if it is possible and if so how you can restrict a user to only be able to view one internet site and all its sub sites and pages but restrict access to anything else. e.g

access to www.bbc.co.uk and then allow access to www.bbc.news.co.uk, etc and disallow www.vbforums.com

???????

Proxy Server for networks or Norton Internet Security for home users .

I need to set each pc individually, is there a registry setting at all?

If individually , I believe you can set your custom security settings in IE .Tools-----> Internet Options ----->Security .