In future version, WordPress should integrate the following:
Mutliple User Accounts
Create multiple user accounts, each with their own login details and permissions.
User Groups With Permissions
Create multiple user groups, each with their own permissions right down to the item level.
The flexible allow/deny logic makes it easy to create accounts for content contributors, managers and super users - in fact anyone in your organization who needs to contribute to your website in any way.
User groups can be setup with flexible access types including full control, create new, delete, edit and approve.
Workflow Approval System
Content can be set to require approval before being published on the website. You can set some content types (such as press releases and staff profiles) to require approval and allow others (such as blog posts and videos) to be published immediately.
Easily disable a user account with one click from the control panel. Once disabled, the user will no longer be able to login and make changes to your website.
Users in Multiple Groups
A user can belong to multiple groups if required. In fact, a user can be in as many groups as required, simply by selecting the groups when you create/edit their profile.