/System/Library/CoreServices/ManagedClient.app/Contents/PlugIns/wifi.profileDomainPlugin/Contents/MacOS/wifi
The binary is a part of wifi application.
/System/Library/PrivateFrameworks/DeviceToDeviceManager.framework/PlugIns/WiFi.bundle/Contents/MacOS/WiFi
The binary is a part of DeviceToDeviceManager private framework.