If you mean is the IP address that made the decryption key request accessible to you in a report or online query, then no.
If you mean does Cisco have that information, then I guess it could have; CRES is a web server accepting HTTPS requests so there must be a source IP address for each request. Whether they hold that information I don't know. Whether they would let you have it if they did is very doubtful for privacy of the recipient reasons.
