http://wordpress.org/extend/plugins/wordpress-access-control/ seems to do what you need. You can probably also use http://wordpress.org/extend/plugins/role-scoper/ but it’s sort of complicated.
http://wordpress.org/extend/plugins/wordpress-access-control/ seems to do what you need. You can probably also use http://wordpress.org/extend/plugins/role-scoper/ but it’s sort of complicated.