You can configure the plugin to have private to do lists for each user, to have all users share a to do list, or to have a master list with individual completion of items. The shared to do list has a variety of settings available. You can assign to-do items to a specific user and optionally have those items only viewable by that user. You can also assign different permission levels using capabilities. There are also settings to show deadline and progress fields. Category support is included as well as front-end administration.