That is not how MultiZone has been designed. MultiZone (https://community.arubanetworks.com/t5/Technology-Blog/MultiZone-with-ArubaOS-8-2-networks-for-the-price-of-1/ba-p/277104) will share the LAN and AP infrastructure, and by creating tunnels still keep the traffic securely separated.his approach also reduces cost, as you don't need to pull the second cable and install the separate switches.
This approach reduces cost (and complexity), as you don't need to pull the second UTP cable and install the separate switches for both (or all) tenants, still separating the traffic.
If you really fully want to separate the 2 networks, you cannot share the AP or the environment (Air, location) either; so there are probably some wishes or requirements that are behind the request that probably can be met.
Please discuss the exact use-case with your local Aruba SE to get to the best design for your customer.