Named User Licensing
With this type of licensing, you can setup users (Office Therapy) or providers (QuicDoc) for the number of licenses you purchased. Let's say you have an office with 6 rooms and a PC in each. There are 4 users/providers who use these PCs. With named user licensing, you can install QuicDoc or Office Therapy on all 6 PCs. You can setup 4 active users/providers who can logon at any of the PCs.
If you run QuicDoc or Office Therapy in a Terminal Server, Citrix, or GoGlobal environment you cannot use machine based licensing. Only named user licensing is available in these environments. You can install the software in these environments to serve out to users, but you will need to acquire licenses for each user/provider.