Forum posts are a special case though. Posts to a forum will always be reshared by the forum in which case both the owner and author is the forum channel.
reshared by the forum
The reason is interoperability. None of the other fediverse projects supports the owner/author model.
[share author='Scott+M.+Stolz' profile='https://wistex.biz/channel/scott' portable_id='xxx' avatar='https://completehostingguide.com/photo/profile/s/10' link='https://completehostingguide.com/item/xxx' auth='true' posted='2022-05-14 01:44:13' message_id='https://completehostingguide.com/item/xxx'][h3][b]Example Post[/b][/h3]