Custom Post Type

Depends on how the CPT functions. If it operates similar to a post or a page, then probably. If it’s something that uses a lot of custom post meta to display (such as is common with Calendar plugins and such), then it may not work as well.

That doesn’t mean there aren’t options available, though. The plugin does have a function wpmem_redirect_to_login() that can be used to create redirects to a login page if content is marked as blocked. Something like that could be used to handle a problematic content type.

Also, the plugin has an additional setting in the most current release to “hide” a post. That may work with certain CPTs as well (but consider that feature is new, so it hasn’t been run through the ringer like the basic block/unblock settings have).