I'm trying to block access to certain urls (http://www.facebook.com
among others...) from a particular pc on my net, which is connected via
wi-fi.

The dedicated page on my router config says "You can block access to
certain Web sites for a particular PC by entering either a full URL
address or just a keyword of the Web site"

1) but on the same page there's non way telling it the particular
internal IP to block, only the http address or keywords...

2) Not only. If I enter http://www.facebook.com the site gets blocked,
but only for another pc which is connected wired to the router, and not
for the wireless connected one, which is what I want to do (but, if
point 1) is irresolvable... I can also accept to block the url from ANY
pc on the net)

Any suggestion?

Thanks, Menestrello