If you're concerned about a specific IP, and haven't been abusing HN, it should be easy to clear up by emailing hn@ycombinator.com. And even if you have been abusing HN, we're always happy to unban people (and/or their IPs) if they give us reason to believe that they've taken https://news.ycombinator.com/newsguidelines.html to heart and will follow the rules in the future.
This is not accurate based on my testing. If I browse to HN while logged in to my account from the affected network, that account can never post properly again.
At this point, three people, including a mod, have suggested you contact the mods via email to investigate further and get to the bottom of your particular situation. Have you done so? If not, that does seem to be the most constructive way forward.
The article is about bringing transparency to HN operations. To allow what I believe to be a factually inaccurate statement by one of the operators just stand as the last word is against the spirit of the discussion.
Okay. For the sake of discussion, what would satisfy you in terms of transparency? Perhaps I'm misreading you, and please do correct me if I am, but it seems you've arrived at a conclusion of bad faith on the part of mods. What would move the conversation productively forward?
Edit to add: Without more details from you, I can imagine the mods being hamstrung with respect to figuring out or explaining what's going with what you're observing. Likewise, there's nothing preventing you from continuing your comments here while also emailing them. Particularly as it seems you'd like to continue to participate on HN. I can imagine you'd prefer to do so without the hassle you're currently experiencing.
If you're concerned about a specific IP, and haven't been abusing HN, it should be easy to clear up by emailing hn@ycombinator.com. And even if you have been abusing HN, we're always happy to unban people (and/or their IPs) if they give us reason to believe that they've taken https://news.ycombinator.com/newsguidelines.html to heart and will follow the rules in the future.