I have to imagine this is something that gets done in corporate and home networks, but I seem to be choosing bad search terms and haven't found an answer.
What I'm aiming to do is to block certain content from part of a website without blocking the entire domain. That is, I want to block
www.website.com/part_one but not block
www.website.com/part_two. I know I can't do this with a tool like OpenDNS, but I'd like to find something simple that makes it easy to configure the list. I'm not afraid of command-line tools. I would prefer something that I can do at the LAN level instead of at the device level, if such a thing exists.