Are you looking for the client IP address in SMACCESS log? (Note: Client the made a request to the APIM server)
Example:
AzAccept MCQST02-U154484 [30/Sep/2015:12:28:20 -0400] "138.42.187.163 cn=AUser30,ou=APSUsers,dc=ca,dc=com" "lodsun30a-mysite GET /app2/index.html" [0000000000000000000000000a823a0b-4054-560c0d43-004d-83c02fb7] [0] [] []
If so I have and open bug to have the clientIP always populated (which is not populated if IPCheck is not enabled on APIM side)
DE388060
Targeted Release Number changed from null - next cr cycles
API Gateway v9.4.00 CR01
API Gateway v9.3.00 CR05
To get the ClientIP populate without a fix will turn on IP checking on the SSO side - not always wanted