By default lid lists groups containing user name, or groups containing the invoking user if name is not specified; the mode of operation can be changed using the -g option.

-g, --group

List users in a group name, or in the invoking user's primary group if name is not specified.

-i, --interactive

Ask all questions when connecting to the user database, even if default answers are set up in libuser configuration.

-n, --onlynames

List only group or user names. By default the corresponging user or group IDs are listed too.