Add support for an isolated network configuration

[kapsiR]

Suggested new feature or improvement

Would be cool to improve the security in the sandbox by providing an option to have network access, but very limited (e.g. internet only).

Example configuration:

<Configuration>
    <Networking>Isolated</Networking>
    <ProtectedClient>Enable</ProtectedClient>
</Configuration>

Scenario

Now, we have to allow network to get internet access.
The machine, even with the NAT. has access to the local network of the host machine. That's not very good from a security perspective.

Additional details

Windows 10.0.19045.4894