[squid-users] Squid ACL as per User name / Group Name

Dear Squid Enlightened,

I was looking for a way by which I could filter the content as per the group

Example:
I have a group named Text , and Graphics

The users belonging to the Text group must be able to only view the
text of any website i.e all the Graphics , Flash gets restricted to
these user.
On other hand the users belonging to the Graphics users must be able
to view the Graphics and the text content of any website they visit.

I am using pam_auth for authentication.

Is their a way to do this with ACL list.
Would appreciate any help or pointers to achieve the above.

-- 
With Best Regards,
Vishal Kashyap.
Lead Software Developer,
http://saihertz.com,
http://vishalkashyap.tk