I was curious about this but couldn't see a way to filter specific machines using the web interface. The CPAN Testers Reports page has download links for JSON, RSS and YAML. I downloaded the JSON data and wrote this quick-and-dirty script:

#!/usr/bin/env perl

use 5.010;
use strict;
use warnings;

use JSON;

my ($json_file, %json_wanted) = @ARGV;

open my $json_fh, '<', $json_file or die "Can't open $json_file: $!";
my $json_text = <$json_fh>;
close $json_fh;

my $json_array_ref = decode_json $json_text;

TEST_HASH:
for my $test_hash (@$json_array_ref) {
    for my $wanted_key (keys %json_wanted) {
        my $test_value = $test_hash->{$wanted_key};
        next TEST_HASH unless defined $test_value;
        next TEST_HASH unless "$json_wanted{$wanted_key}" eq "$test_va
+lue";
    }

    for my $key (sort keys %$test_hash) {
        say $key, ': ', $test_hash->{$key};
    }

    say '-' x 60;
}
[download]

Here's a test run filtering on a specific tester and a specific Perl version:

$ pm_cpan_test_extract.pl Tk-ROSyntaxText.json tester 'was_a_real_emai
+l_address' perl '5.17.0'
csspatch: unp
cssperl: dev
dist: Tk-ROSyntaxText
distribution: Tk-ROSyntaxText
distversion: Tk-ROSyntaxText-1.001
fulldate: 201205260128
guid: 0bf30766-a6d2-11e1-88ae-fe3ff4b14d39
id: 22275926
osname: linux
ostext: GNU/Linux
osvers: 2.6.32-5-amd64
perl: 5.17.0
platform: x86_64-linux-ld
postdate: 201205
state: pass
status: PASS
tester: was_a_real_email_address
type: 2
version: 1.001
------------------------------------------------------------
csspatch: unp
cssperl: dev
dist: Tk-ROSyntaxText
distribution: Tk-ROSyntaxText
distversion: Tk-ROSyntaxText-1.001
fulldate: 201205220052
guid: 77d0ff9c-a3a8-11e1-8aed-c04af4b14d39
id: 22217880
osname: linux
ostext: GNU/Linux
osvers: 2.6.32-5-amd64
perl: 5.17.0
platform: x86_64-linux-thread-multi
postdate: 201205
state: pass
status: PASS
tester: was_a_real_email_address
type: 2
version: 1.001
------------------------------------------------------------
[download]

I changed the tester's email address to was_a_real_email_address before posting here. Use http://stats.cpantesters.org/cpanmail.html if you're really that interested. :-)

I saw Khen1950fx's response as I was about to post this. I'm not familiar with the module he's used. Perhaps that's a better solution.