If your question was how to read the data into the hash, here is one possible way:

#!/usr/bin/perl
use warnings;
use strict;

my $exe;
my %hash;
while (<>) {
    my ($quotas, $start, $finish) = split ' ';
    if (not defined $finish) {
        $exe = $quotas;
        <>; # Skip the following header.
    } else {
        $hash{$exe}{$quotas} = [ $start, $finish ];
    }
}

print $hash{'ww.exe'}{def}[0];
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