listingreports that user has access

How can I get the list of reports that a user has only view reports access ?
the user is in windows server 2003 active directory.
reporting services 2000 is being used.
within the intranet there is a portal.
in the portal I want to list the available reports to the user
that he can access. I do not want to display all the reports to him and let
him choose. I want him to be able to see only the reports he is allowed to
see?
how can I do this using asp.net 1.1
thanx
rifatis it possible or not?
can someone answer please ?
thanx
rifatsql