Great, you can contact us on Telegram https://t.me/mysterium_network or any of our other social media platforms in order for us to receive your Name, Email, Country and Operating Systems information to sign you up for the node hosting testers group. Details of specific functions and features will be released before the node hosting period begins. If not a default feature the traffic limit specification can be added to the feature requests or should be in the works for more advanced versions of the software in the future.