Can this be done?

["Jim Mainock" <jim_mainock@xxxxxxxxxxx>]

We are currently running squid 2.5 using ncsa_auth to authenticate users. We 
would like to be able to allow internet access to specific urls by users in 
a department. My thought was to create a file containing userids for each 
department then another file containing urls for each depart they can 
access. How can I create an acl that will test if the user is in a 
particular department. I've seen examples using ident but can this be done 
using ncsa_auth? Any help would be appreciated.