I posted the original post to LemmyCa with my LemmyCa account https://lemmy.ca/post/716848

I’m following !vancouver@lemmy.ca (search for it and follow in Mastodon with @vancouver@lemmy.ca)

That account boosts the OP as well as all of the comments.

My replies / comments are now all from this server, with my account here.

You can read it quite well in your Mastodon client. You can’t (currently) reply with a Mastodon account to turn it into a comment.