I do the IT work for the church I attend. There are about 30 computers behind a router flashed with DD-WRT. I have it set to use the OpenDNS service mainly for content filtering. Adult content needs to be blocked for all computers, but only as select few need sites like Facebook, Youtube, etc... blocked.
How can I set up DD-WRT to basically segment the computers? We have 5 external IPs, so if I could get DD-WRT to send traffic over 1 IP for most, and another IP for the rest, I could easily set up OpenDNS to block what is appropriate for each network.