/usr/share/live/images/lxde-desktop/config/package-lists/standard.list.chroot is in live-image-lxde-desktop 5.0~a5-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | ! Packages Priority standard
task-laptop
task-ssh-server
|