You would be much better using a hash:

use strict;
use warnings;
use Data::Dump::Streamer;

my %users;

while (<DATA>) {
    chomp;
    my ($user, @attributes) = split /\s*,\s*/;
    
    $users{$user} = [@attributes];
}

print $_, " @{$users{$_}}\n" for keys %users;

__DATA__
Fred, 17, male, Perl monk
Joe, 23, male, Perl Monk
Jane, 22, female, Java junkie
[download]

Prints:

Jane 22 female Java junkie
Joe 23 male Perl Monk
Fred 17 male Perl monk
[download]