router with parental control

I am looking for a home broadband router that will do web based and
usenet filtering parental control. I want it to filter/block adult
content from usenet newsgroups and web sites, block p2p apps and those
web sites and protocols. Does anyone have any ideas? I currently have
the Belkin 802.11g wireless with built in parental control filtering and
it uses Cerberian www.cerberian.com for web based filtering, works good,
but there's no usenet nor p2p stuff at all. So I'm looking for something
that can do all of this also with the ability not to reset the filter or
password just by resetting the router which is way to easy to bypass. It
would have to be using a parental control filtering company, not where
you enter in urls and set it up to block ports, that won't work good.

For web sites, it would need to block also based on user input keywords,
not only a list of categories. For usenet newsgroups it would need to
block the groups by name not only by port 119. I need it to filter adult
newsgroups by name such as erotica, xxx etc, and have the ability to
specifically tell it what newsgroup to block, or use a keyword such as
pictures, xxx, erotica and so on. It should be able to block based on
that, not just port number as you can with some nsps change the port
from 119 to say port 80, 25, 8000, 9000, etc, so the router would still
need to block/filter newsgroups if I changed the port number for usenet.

I've looked at Zyxel, belkin, linksys, netgear, SMC, cybergaurd,
snapgear, none of them have anything like this.

Take care