Are you sure you're talking about eggdrops? Eggdrop use flags, each with certain privleges, and not levels...
.help wrote:#nml_375# help adduser
### adduser [!]<nickname> [handle]
Creates a new user record for a user on the channel, using their current
hostname. It's similar to a user /msg'ing the bot 'hello', except that no
information is sent to the user. If the bot already knows someone by that
nickname, and the user on the channel doesn't have a bot record, then it
does the equivalent of an 'ident' for that user--except that, again, no
information is sent to the user.
If the user is using a different nickname than the bot normally knows them
by, you can specify their "handle" (the nickname that the bot remembers
them by).
If you want to add a user using a static hostmask, prefix their nick
with a '!'. For example:
.adduser !Lamer
See also: deluser, +host, -host, +user, -user
To alter permissions, use the .chattr command and assign proper flags.
See help for the .whois command for a full listing of possible flags...