The twin stick shooter example is not multiplayer ready, it’s a very simplistic approach meant for single player. That said you can turn it into multiplayer easily by adapting it to use a Character as it’s parent pawn class, this way you will be using a CharacterMovementComponent which does work in multiplayer. I encourage you to create your own movement component because Character and CharacterMovementComponent requires a CapsuleCollision which might not fit in your case.
I’m preparing a sample of the TwinStick shooter that works in MP, I hope I get it to the wiki in a couple of days.
Edit: The promised sample:
https://github.com/moritz-wundke/UnrealEngine/tree/TwinBlast (you will have to login with a valid account that is properly linked to your UnrealEngine account)