What are the different ways to control access to documents in an online renovation planroom?

Bill's Blueprint Online Planroom is a password-protected repository of images of digital construction documents that can be accessed via the Internet using Internet Explorer or any other web browser. The system allows different levels of access and control by different classes of users depending on their username and password. When the online planning room is used throughout the construction cycle, consultants and subcontractors from remote locations can also access the online planning room to review current documents and request printouts through Bill's Blueprint, Inc.