WordNet (r) 3.0 (2006):

wise to
    adj 1: evidencing the possession of inside information [syn:
           knowing, wise(p), wise to(p)]

Moby Thesaurus II by Grady Ward, 1.0:

23 Moby Thesaurus words for "wise to":
   alive to, appreciative of, apprised of, awake to, aware of,
   behind the curtain, behind the scenes, cognizant of, conscious of,
   hep to, in the know, in the secret, informed of, let into,
   mindful of, no stranger to, on to, privy to, seized of,
   sensible of, sensible to, streetwise, undeceived