k here the code to get the users_list

#--in case ur running from windows version of apache ---
#!C:\perl\bin\perl.exe 
#-- if ur in linux versions --
#!/usr/bin/perl

#using CGI standard module
use CGI qw(:standard) ;

#$cgi is a reference for CGI module
my $cgi = new CGI;

#this is a header which sends to the browser that the
#content will be text/html
print header();

#now ur copying the selected contents into an array
my @select = $cgi->param('users_list');

#displaying them on the page in one line 
print @select;
# or u can display like this in dirrent lines
for ($i=0; $i <= $#select; $i++)
 {
  print $select[$i], "&lt;br&gt;";
 }