User/player confusion?

Roku Media player and an app on my iPhone called C5 or Creation 5, both make no allowance for username entry so they both are represented by Subsonic as "guest". The problem is that if I have both Roku streaming and iPhone streaming, the same "player" is used for both "guests", therefore not showing both streams in the Monitor graphs. What can I do to make the user or the player unique to each platform?