Форумы / Cotonti / Extensions / help wanted with rights

How can I get all the categories (page_cat) were the current user have reading rights..

I want to include a filter in an SQL statement to filter out only the pages were I have reading rights...

something like :: WHERE page_cat IN (a,b,c,e)

(note: i do not have reading rights for cat 'd')

hope the answer comes soon