Is it possible to use multiple sources for an access rule and have them
"AND"ed instead of "OR"ed?

For instance, I have a certain group of people that I need block but
only from a certain IP range (if they're in another place such as the
labs they're allowed to surf).

I've made a Novell group and can block successfully on that.
Alternatively, I can block fine on that IP range.

I can't find anyway though yet to block just that specific group when
they're coming from a specific IP range.

Any thoughts?

Thanks in advance for any help.