Hi Anja,
Thanks again for all the feedback and suggestions!
Actually, I think this use case may already be covered using Joomla permissions, depending on your workflow.
You can go to the CommentBox permissions and give the Authors user group the “Edit Comments State” permission. Users with this permission will have their comments published automatically, so article authors will be able to reply without waiting for moderation.
Please note that this permission is not limited to comments on their own articles. It applies to all comments, so authors will also be able to change the state of other comments.
Could you check if this workflow works for the Joomla Community Magazine?
If this does not cover your needs, let us know and we can reconsider adding a more specific option that only applies to the author of the article.
Thanks again for helping us improve CommentBox!