CivSpy for Bungee is still fairly nascient. Although like CivSpy for Bukkit it leverages the power of HikariCP's connection pool, at present it lacks any of the scaled-out infrastructure of CivSpy Bukkit.
Currently, it simply records login, logout, and session times at the network level.
Check out the javadocs for best details on getting started with CivSpy-Bungee.
Having trouble loading the javadocs? Clone this repository locally and you'll have them available -- just navigate to the index.html file inside apidocs folder.
As of Sept 2 2016:
bungee.playercount - Periodic count of players online. Period controlled by 'interval' in config.
bungee.login - Point data on players joining the network
bungee.logout - Point data on players leaving the network
bungee.session - Point data on how long inbetween join and leave (session length). Recorded at leave or shutdown.