You can't go from the tablet wifi to two devices at the same time but if you're looking to get traffic on your Skyview and SkyDemon at the same time it is possible. Basically, you need to buy a simple USB to RS232 converter, which is plugged into your PilotAware box and three of the leads (Tx, Rx and Gnd) are then connected to your Skyview. A couple of settings are made to the Skyview and the traffic will then show up on your map. The rest of the time your SkyDemon will be connected to PilotAware via wifi and will display traffic on your iPad.
Have a look here for a guide on how to connect to your Skyview: