@kspickler For Instant ON AP's you have the ability to assign a VLAN to the Employee network in the configuration. When you create the Guest network it will create an internal VLAN and NAT all traffic through the default gateway of the AP. So if you configure your switch for the native VLAN you use for the employee's and all traffic will traverse that network.
You could create multiple employee networks on different VLAN's and name the second one Guest.
Example for an Aruba Switch
interface 1
tagged vlan 20 (Guest)
untagged vlan 10 (Employee)