Do you mean something like:
alias add {
writeini filename.ini levels $1 nick1,nick2,nick3
}
I don't know from where it gets nick 1, nick2 ....
If its from User that you enter with the command, then you could use $2-
You can seperate the users with spaces, and then use: $replace($2-,$chr(32),$chr(44)) to put "," instead of spaces.