Disable Little Snitch in guest account?
Login to the Guest Account.
Disable Little Snitch Network Filter
Open Library > Preferences,  copy at.obdev.LittleSnitch... to a shared folder
Logout and Login to Main Account
Open Terminal and run sudo su
Open Library/username/Library/Preferences and overwrite file with copied file.
Logout and Login to Guest Account.  LS is Disabled.