This add-on enables users to post messages in threads using another user's account. This can be useful for managing multiple accounts or assisting users who may have difficulty posting on their own.

Permissions
The permission to post as another user is in the "Forum moderator permissions" group.
It can be configured individually for the section.
* The add-on performs the entire posting process on behalf of another user, so when posting on behalf of another user, it must also have permissions to send a message