Eddie - VPN Tunnel

Can I use multiple profiles?

The default profile are called Default, saved in Default.profile file under your data directory.
You can use the command-line option profile to specify another profile, for example Eddie-UI.exe profile=myname to use the myname.profile file as profile.
Check Where are client settings and data saved? to understand where profiles are saved.

Eddie is developed by and is the official client of AirVPN, an OpenVPN and WireGuard based VPN operated by activists in defense of net neutrality, privacy and against censorship.