The idea is when a text post is made (Show/Launch HN/Annoucements), the poster can add a row at the very end of the post with a bunch of usernames like

/u/keerthiko_cofounder; /u/keerthiko_employee ...

which can be parsed by HN and color the account names of those users when they respond in the thread. It would be nice to tell when someone responding to my comment is one of the founders or someone who knows what's behind the scenes of the topic, without them having to reintroduce themselves in every comment, if they weren't the OP.