It is beyond the scope here, but as Howard says there is a filter by column and filter by Category properties in a Domino View DataSource. I have built 3 custom controls for a 1 category, 2 category and 3 category repeat control and I can set one of those in place in minutes now. The beauty of XPages is that this sort of control on the user interface is beyond anything possible in Native Notes.
When I started doing this sort of thing I can't believe how difficult I made it for myself. Then the light broke through and noticed the filter by properties and a few other things. I now use almost nothing but repeat controls for user 'view', dropping the results of a FTSearch into a repeat is so simple. Now you can get a 'view' that is very specifically targeted to the current user.
I would be pleased to share more info with you if you would like drop me a line at bill_fox@WFSystems.ca