my %multihash = (
        jarich => {
                company => "Perl Training Australia",
                name => "Jacinta Richardson"
        },
        pjf => {
                company => "Perl Training Australia",
                name => "Paul Fenwick"
        },
        fred => {
                company => "XYZ Retail",
                name => "Fred Bloggs",
        }
    );
print $multihash{jarich}->{name},"\n";

# jetzt will ich den Multihash erweitern
push(@{$multihash->{'jarich'}}, {test => "neuer wert"});
print $multihash{jarich}->{test},"\n";

$multihash{jarich}->{test} = 'neuer wert';