Since there are no examples of that at https://news.ycombinator.com/submitted?id=ipaddr, I assume you're talking about a different account.

It's possible that account is banned, but more likely your self-posts might be getting filtered by HN's software which tries to apply this guideline: "Please don't use HN primarily for promotion. It's ok to post your own stuff part of the time, but the primary use of the site should be for curiosity.:.