first FAQ entry of dansguardian:
1. I want ACL-like features where different users and groups and subnets and times have different settings. Can DansGuardian do this?
No*. It can switch off filtering for certain users, sites and IPs, but not varying degrees. This ability you desire is called ACLs. Nor can it block for ranges of IPs or subnets. Nor can it block by time of day. If you need this install squidGuard also.
*Actually as of version 2.7.5 it can have different filtering for groups of users but it still can't do time of day functionality nor subnets nor range of IPs.
http://dansguardian.org/?page=faq#1