Even though I think they're always meant in good faith, comments like these are virtually never helpful on HN. If you have something interesting to say about someone's affiliation, say it; otherwise, it's probably best to leave it alone.
It was very clear to me and I assume many other people that this user was associated with the article.
With more than a handful of upvotes and my past experience dealing with similar situations, it's neither obvious, nor unreasonable.
Beyond that, while it's clearly at your option, as far as I'm able to recall anytime you've had a submission related to you pop-up on HN you've disclosed your affiliation.
"Andrew Gust" is a real name, there's zero reason not to disclose the affiliation, and the fact he himself has disclosed it before points to him understanding it's potientally not obvious.
It was very clear to me and I assume many other people that this user was associated with the article.