while(my $client = $server->accept()) {
    $select->add($client);
    foreach my $socket ($select->can_read(5)) {
        print "$socket\n";
    }
}

use strict;

use IO::Socket::INET;
use IO::Select;

my $server = IO::Socket::INET->new(
    LocalPort => 2005,
    type => SOCK_STREAM,
    Reuse => 1,
    Listen => 10
) or die "Server läuft nicht: $@\n";

my $select = IO::Select->new($server);

while(my @readable = $select->can_read) {
   foreach my $socket (@readable) {
      if($socket == $server) {
         # Create a new socket
         print "New client connects\n";
         my $client = $socket->accept; # kehrt direkt zurück
         $select->add($client);
      } else {
         my $line = $socket->getline;
         if(defined $line) {
            $line =~ s!\r?\n$!!g;
            if(lc($line) eq "quit") {
               print "Client quits\n";
               delete_socket($select, $socket);
            } else {
               print "Client says: [$line]\n";
            }
         } else {
           print "Connection closed by client\n";
           delete_socket($select, $socket);
         }
      }
   }
}

sub delete_socket {
   my ($sel, $sock) = @_;
   $sel->remove($sock);
   $sock->close;
}