How do comment @replies work?
When I respond to a comment that's not the immediate predecessor of my comment, I'd like to include the commenter's @ handle so it's clear who I am responding to. However, since you are constrained from having only one @ handle, I can't reference the answerer as well. Is there an equivalent of OP (original poster) for the person who wrote the answer that it well understood on the StackExchange network?
Update: One workable solution is simply to prefix the second @ handle with a period; that way you can clearly indicate that these are users you're talking about (which, with some handles is not obvious).