GUID based Authentication on FreeRadius

Anyone know if this is possible. I have found information on MAC Based Authentication but nothing on GUID. Joseph R. McSparin Network Administrator Hill Country Memorial Hospital 830 990 6638 phone 830 990 6623 fax jmcsparin@hillcountrymemorial.org -- This email message and any attachments are for the sole use of the intended recipient(s) and contain confidential and/or privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply email and destroy all copies of the original message and any attachments.