I doubt that. If that would be the case then the following wouldn’t work:
- When fully logged out of any OSMC service, log in to the forum
- Log out of the forum
- Hit “Log in” again
- Alas, you’re not asked for your credentials at this point.
Yes, you’re logged out of the forum at step 2, but you already established a shared session at “My OSMC” that you’re totally unaware of. That shared session is then reused at step 3/4, while the two services shouldn’t share any session state in the first place.
Update: the same is true the other way round, obviously: when I log in to the forum, I’m logged in to “My OSMC” as well, due to a shared session.