Help On getting the Client name when Proxy enabled

Hi All, In my module we need to send client name to apply to retrieve some poly info based on client. Earlier I am extracting the Client name and iP details from Client property of REQUEST Parameter. It was working fine. Now I enabled the proxy for load-balancing after enabling this I am client property gives the details of load-balance(proxy server) as Client, I am not able to retrieve the orginal Client information. Can any body point me to how to get Original Client info. Regards, Shivaprasad