Dictionary.com
Thesaurus.com

restricted users group

British  

noun

  1.  RUG.  a group of people who, with knowledge of a secret password, or by some other method, have access to restricted information stored in a computer

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012