Having looked over your conversation with HelenCr, I think a slight step back is in order to focus on the key issue. The following code mocks up a solution to the issue of passing in a "module reference" to a "collection" sub to get some work done:

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

package FW;

sub extract {
    return "It's a FW";
}

package VRF;

sub extract {
    return "It's a VRF";
}

package main;

my @fw = collect('fw');
my @vrf = collect('vrf');

print "$_\n" for @fw, @vrf;

sub collect {
    my ($type) = @_;
    my $module = uc $type;
    
    return $module->extract();
}
[download]

Prints:

It's a FW
It's a VRF
[download]

The key is that if you want to call a function in a module you can use the syntax $modulename->function() to make the call.