Protect access to blogs by group membership.
This plugin allows to redirect visitors to a blog who do not belong to the blog's Registered group.
The plugin is an extension to and requires Groups.
Note that the current version does not allow to specify a particular group - at least in that sense, the status of the plugin can be considered somewhat experimental.
The redirection settings can be adjusted in Settings > Groups Blog Protect :
Redirection options can be set for the blog - or for each blog in a multisite setup:
The redirect status code can be selected among: