The OG Audience module allows Organic Groups (OG) users to change a node's audience without having to edit the node.
This module works by providing a new change audience permission, and an Audience tab and/or block on node pages that allows users to change the audience of existing content. A user can add any node to one or more of the groups he/she has subscribed to. A group manager can remove a node from his/her group(s). A node's author can remove the node from one or more of the groups he/she has subscribed to.