Dividing traffic through CP and Squid

[Coda]

Hello

I'm new here.. I set up a PfSense 2beta Captive Portal + Squid (transparent) for filter users.
In my lan I have to filter 2 groups:
Group A: Cannot surf in some sites, that I put in the Squid's blacklist
Group B: They can surf everywhere, without filtering

How can I divide the users in theese two groups, through the captive portal login?
I cannot set up squid in non transparent

Thanks for the help

[Coda]

No one?

[heper]

if you use a layer2 switch with vlan's then you have virtual interfaces that you assign to squid ….

interfaces not assigned will not pass squid and thus not get filtered