Dynamic ACL Regex's associated with authenticated user

Hello Dev team,
I'm curious, but have found limited information through different FAQ's
and archives about Squid functionality, which provides dynamic new
regex's to be checked against specific authenticated users?

Two functionalities I'm wondering about specifically:
1) Can Squid use a database server such as Postgres/MySQL to store the
ACL regex's or in genearl all ACL's, so that Squid can query on the fly?
2) Is it possible to associate 'authenticated users' to these ACL's?

Thanks for any insight you can provide.

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