Extra right "can be assigned"

Case number:200-2
Project:Case Tracker
Opened by:zero2one
Status:Open
Assigned:Anonymous
Priority:3
Type:General Task
Opened on:Friday, October 19, 2007 - 13:15
Last modified:Friday, October 19, 2007 - 13:15

"can be assigned" : only users in a role with that right are shown in the autocomplete when assigning a case