New in version 2.02 of the Personal, Preferred and Deluxe Editions is support for multiple users with Dragon NaturallySpeaking.  The user interface now has a new User menu which allows you to select which set of speech files you want to use.  Each user (separate set of speech files) has to run General Training separately to train the system to their voice.  But, you can switch which user is active without restarting Dragon NaturallySpeaking.

The number of users which are supported in NatSpeak is only limited by disk space.  If you have more than one user, then when you first launch Dragon NaturallySpeaking you will be prompted for which user should be loaded initially.  You can also force a particular user to be loaded with a command line parameter which means that you can create desktop shortcuts which launch Dragon NaturallySpeaking with specific users initially loaded.

(For example: c:\NatSpeak\Program\natspeak.exe /User "Joel Gould")

Each user takes approximately 8 MB of disk space assuming one topic.  (Dragon NaturallySpeaking also automatically creates backups of each user, and each backup also uses 8 MB of disk space.)