In the current releases of IBM Connections, global moderators are allowed to access all communities (public and private). If a global moderator is not member of a specific community, he might not be able to access dedicated community applications (e.g. files, forums), but has at least access to community overview page. The overview page already lists some content which has been created in the community. This is not acceptable from security point of view.
The access to community content for the purpose of content moderation has to be limited only via the moderation application, if the global moderator is not member of the community.