Simple answer, it depends.

I believe the difference is if it is bridged or not. In a bridged topography, EVERYTHING goes through the tunnel, and your outgoing connections are no different.

In a standard setup, your VPN clients maintain their default gateways, and send Internet traffic from the local Internet connection, so the local public IP is what remote servers will see.

Note that this may require some knowledge of DHCP and routing to set up. Since all clients get their IP addresses from the main DHCP server, you need to configure that server to only assign IP addresses to the remote clients, not default gateways.

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