Vertical portals
Typical uses can include large distributed and integrated corporate enterprise portals or vertical industry portals providing specialized business services to a wide range of often competing enterprises that each require 100% security for their respective resources, while still, occasionally and at will, sharing some of these resources with partner(s), under custom protocols and constraints.

Example
For example, a vehicle embedded computer manufacturer sets up a central portal where all the vehicle and truck computers from trucking companies communicate their real-time data directly and securely to the portal and where dispatchers, trackers and administrators get their business reports on their respective fleets and can track their vehicles directly from the web portal.