Filtering tables based on user privileges - Mailing list pgsql-interfaces

Hi! 

I have a need to filter out tables that have specfic privileges for a user.
For example, select
all tables where user 'joe' has 'select' and 'insert' privileges. Can I
somehow filter
that at SQL level or will I have to get all non-system rows from pg_class
and filter it
one by one? How can I use whre clause against aclitem[] array?

Regards,
Brijesh Shrivastav