Open qBittorrent
Go to Tools
Open Options
Select Advanced
Find Network Interface
Choose your VPN adapter
Find Optional IP address to bind to
Select the VPN IP address if available
Click Apply
Click OK
Restart qBittorrent
Verify the VPN interface is still selected
Test by disconnecting the VPN and confirming qBittorrent stops connecting
Reconnect the VPN and confirm torrents resume only through the VPN