As much as we would like to provide you assistance with this, a guest network is an option that most modern routers and modems have, and each configuration depends on the manufacturer. Your best option at this point is to check the documentation of your router/modem or contact the manufacturer directly for further instructions.
On our best effort to put you in the right track so you can have an idea on how do that while checking with your router manufacturer, here is a link that might help you understand how it works: http://www.howtogeek.com/153827/how-to-enable-a-guest-access-point-on-your-wireless-network/ How to Enable a Guest Access Point on Your Wireless Network
*Please bear in mind that this link is merely informative and is given to you for your convenience only and its content, instructions and information on the subject discussed does not represent Intel Corporation.
If you have any questions about any Intel® Wireless hardware such as any of our wireless adapters found in this link, http://ark.intel.com/products/family/59484/Intel-Wi-Fi-Products Intel® Wi-Fi Products please do not hesitate to contact us.