You are looking for AP group where you could have different characteristics for different AP groups including which WLAN is available on which AP group. In Unleashed, all APs are part of the same group. This is mentioned in online documentation as well http://docs.ruckuswireless.com/unleashed/200.5/index.html#c-UnleashedLimitationsAndDeviations.html
You may want to think about splitting your network in to two (or more - based on what you are trying to achieve). Thus, you may create separate WLANs on these networks.
Ruckus Unleashed mobile app could help monitor & manage those networks.