I'm not sure I understand your question.
Each extension provides its own pages and permissions. There is often a way to give moderation permission to specific groups.
A few extensions add their admin features to the admin panel. In that case only super admins can use those feature (for example, creating tags).
If you are talking specifically about the FoF Upload extension, I'm not sure it has any moderation UI at all.
You could use the FoF Impersonate extension to connect to a user account if you really need to access a feature from their account for which no moderation interface exist.