Separate ethernet and WIFI

Hi to all.

I need to set-up a network of 5 clients running dietpi with chromium in kiosk mode looking at one server running dietpi as webserver which is connected to wifi for remote access. They will all be connected over ethernet to one Hub. I would like to connect to the dietpi server over Is it possible to keep the wifi connection for remote access separate from the ethernet-network? I don’t want the RaspberryPis network to be visible in the main network.

Thanks for any help.