[Chicago-talk] Multi dimensional hash

[richard at rushlogistics.com]

If I have the following hash reference:

my $input_hash = {  

       Hometown => 'Chicago', 
       FName => 'Jim',  
       LName => 'Brown',
       Nickname => 'Jimbo',

};

Is there a way that I can create a multimensional hash like they've done here http://perlmaven.com/multi-dimensional-hashes

But instead have it structured with the input_hash's key name as one of the dimensions? So that I would have:

$validtn_hash{class}{input_hash_key} = input_hash value; # where City and Name are examples of classes

$validtn_hash{"City"}{Hometown} = $input_hash->{Hometown};
$validtn_hash{"Name"}{FName} = $input_hash->{FName};
$validtn_hash{"Name"}{LName} = $input_hash->{LName};
$validtn_hash{"Name"}{Nickname} = $input_hash->{Nickname};

Or is this even possible? 

Thanks