I don't think Lemmy has implemented Federation with Mastadon yet. However, Mastadon has implemented Federation with Lemmy. So, it's a one way street so far.
Is there a way to follow Mastodon posts with my current Lemmy app (connect).
I see the odd comment here that is from Mastodon so I know there is some cross posting that happens but I'd like to follow people on Mastodon and have all on the same feed on connect if that makes sense. Is it possible?
@main@Lem453@troyunrau lemmy doesn't support following individual users, however there are many other platforms that do. I'd recommend you try out Kbin