Hi @Sophie van Noort,
Thank you for posting in this community.
According to your case description, I do understand how frustrated you are now.
Nonetheless, according to the official file, I feel regretful to inform you that it seems that Microsoft Viva Topics doesn't support grouping topics for specific topic contributors. All topic contributors in your organization can edit any topic by default.
If you want to learn more about user permissions and roles in Microsoft Viva Topics, you can check out the references below:
- Plan for Microsoft Viva Topics: User permissions
- Topic experiences roles: Topic contributor and Topic viewer
Please accept my sincerely apologizes for any inconvenience this may casue. Thank you for your kind understanding.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.