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[SLUG] Subscription-based netfiltering (parentally speaking)

Hi All, 

does anyone know of any linux-based filtering software I can put in place to protect him from himself? 

Requirements would be; 

Subscription-based; so, someone out there keeping the list of sites, keywords, extensions, etc. up to date.
Ability for me to add to it for personal choice; - effectively contribute
Ability to IP (or MAC) restrict it's use; - so it's only him and not us. 

I know of Dansguard, but AFAIA, that is a host-based solution.

What else is there pls?