6 years later, is this still a limitation in Horizon? Can the gateway pass the client IP address attribute to the RADIUS server yet? My use case is different from OP's. I am not trying to apply different policies to internal and external users, I am trying to pass the actual IP of the connecting client to my identity provider for logging and alerting purposes and to apply geographical login restrictions dictated by our security policy. For example, to deny access from unauthorized locations or to trigger policies on suspicious location changes.

I can't understand why this feature continues to be overlooked after all these years.