Limit hotspot connection of a cel phone to only the host pc

Dear community,

I find myself with a difficult problem to solve: I have a computer connected to a corporate network, to which I must connect a mobile phone through the hotspot.

I was able to achieve this, the problem is that from the mobile phone I can reach the rest of the devices connected to the network and this is a problem.

In short: The mobile phone must connect to the computer through the hotspot to transfer files but must not communicate with any other device on the network.

Do you have any solution?

Thank you very much,

Kind regards