I followed moritz's advice and used tag_string.t. The documentation for Log::Agent::Tag is extremely dry and probably confusing for you. I hope this helps.

#!/usr/bin/perl

use strict;
use warnings;
use Log::Agent;
require Log::Agent::Driver::File;
require Log::Agent::Tag::String;
require qw(/path/to/my_code.pl);  # the script to run

my $err = '/path/to/file.err';
my $out = '/path/to/file.out';

my $driver = Log::Agent::Driver::File->make(
    -prefix => 'me',
    -channels => {
        'error' => $err,
        'output' => $out
    },
);
my $t1 = Log::Agent::Tag::String->make(-value => "<tag #1>");
my $t2 = Log::Agent::Tag::String->make(-value => "<tag #2>", -postfix 
+=> 1);

logconfig(
    -driver        => $driver,
    -tags        => [$t1],
);

logerr "error string";

use Log::Agent qw(logtags);
my $tags = logtags;
$tags->append($t2);

logwarn "warn string";
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