IE proxy connection settings policy filtering

I have proxy settings through GPO, in the user configuration/windows settings/IE maintenance/connecton/proxy settings

i have the policy applied to an OU with users accounts in it NO computer accounts. no problems its working fine,

what i need to do is filter out an IP range  10.x.x.x ,so user who logon to a machine in that subnet dont get the proxy settings applied to them. How can i get this to work ?

thanks ,