Is there any way to filter or exclude these? I know people post the same link to different communities around the same time to get maximum reach but it gets annoying seeing the same post 2-3 times in a row.

Maybe get the app to read the link, see if it's posted by the same user, then only show the first occurrence/post?

I already swipe to hide the post but I don't want to be hiding everything.

Anyway, just a thought and see if anyone else has a workaround.