while (<ANY>) {
                ......CODE.......
                $OutRecord = "$client:$hosts:$topin:$topout";
                push @OutRecord, $OutRecord;
}

foreach (@OutRecord) {
    print $_."\n"; # Einfach testen!
}

...................... WAS PASSIERT .........................
1:3804.5:921.5:
2:20616:4301:0.5
3:0:0:0
4:0:0:0