The full version gives you "Administrator-level" control. You can create user groups (Admin, Read-Only, Read-Write), set bandwidth throttling per user, and even schedule when certain users can access the server (e.g., disallow guest access after 7:00 PM).
The "Full Version" of Isharedisk 1.8 is not just a marketing tag; it includes specific technical capabilities that power users demand: Isharedisk 1.8 Full Version