Server 2012 RDS (Terminal Clients)

Hi,

I need help & guide on terminal clients internet access. 

Q1: How do i enable only 1 terminal client out of 20 current running windows RDP to have access internet?

Q2: When I need to enable internet access for the terminal client, do i need to enable internet access for the current server or host. (I wish for the server to not have internet access due to it is used in local environment only). 

I was thinking of GPO and web proxy application but im not sure which is the right tool and whether is it workable.

Thank You.