Hi I believe if they have some parent child relationship then its possible to do this..
i have attempted it once and succeed.
What I understand from your point is that.
u want to filter by category , so the category should be the foreign key.
hence u can do two dynamic lists
one for master / Parent
one for detail/ Child

and then apply dependent drop down.
well ur published unpublished concept can also be included..
but u can use only one foreign key as a control key for relationships..
so u can load them from the select statement.
May be i didnt fully understand you..

then you can post ur code in here.
so if not me some one else may also be able to help you

hope this helps

mohnkhan
<http://www.mohitech.com>