No. Separating the 2.4GHz and 5GHz frequencies into two different networks is not supported at this time.
After creating your Orbi’s SSID (network name), your Orbi determines whether your device joins that network with 2.4GHz or 5GHz. Some of the factors that determine if your device connects in 2.4GHz or 5GHz include hardware limitations of the connected devices, the distance between devices and your router or satellite (2.4GHz has a larger broadcast range, 5GHz has a shorter broadcast range but provides faster speeds), and obstacles in your environment (walls, furniture).
SSID separation for these WiFi bands is under consideration for future implementation as we continue to add new features to our products.