[Trace]
TRACE_MODULE=mod1
TRACE_MODULE=mod2

##</code><code>##

use strict;
use warnings;
use Data::Dumper;
use Config::IniFiles;
my $cfg = Config::IniFiles->new( -file => 'fred.ini' )
    or die "error: IniFiles->new: @Config::IniFiles::errors";
my @values = $cfg->val( 'Trace', 'TRACE_MODULE' );
print Dumper( \@values );
$cfg->WriteConfig( 'fred2.ini' )
    or die "error: WriteConfig: $!\n";

##</code><code>##

$VAR1 = [
          'mod1',
          'mod2'
        ];

##</code><code>##

[Trace]
TRACE_MODULE= <<EOT
mod1
mod2
EOT

##</code><code>##

TRACE_MODULE=mod1
TRACE_MODULE=mod2