list-preferences

$ littlesnitch list-preferences --help
usage: littlesnitch list-preferences [-ghu]
  -h, --help
        Print a short help and exit.
  -g, --global-only
        Show only preferences affecting all users.
  -u, --user-only
        Show only preferences affecting the current user.

Without any options, this command lists all Little Snitch preference options and their values:

$ sudo littlesnitch list-preferences
    activeSilentMode = 0
    allowCommandLineAccess = true
    allowGUIScripting = false
    allowGlobalEditing = true
    ...

The options -g and -u limit output to only global or user-specific preferences.