This is a script that does just that, it opens two connections and moves files between them.

It does bring the file down to the local disk, though, so it may not be what you want.

#!/usr/bin/perl -w

use strict;
use Net::FTP;
use FileHandle;

###
# A Script that will get files from one server object
# stored in $ftp_a and put them onto a second server
# object, $ftp_b.
#
# Objective is to do this using filehandles, and not
# actually writing to disk.
###

###
# File list.  Generate however you want.
###

my @file_list = ("some.file");

###
# Begin by opening the connections to the two servers
# and logging in.
###


my $ftp_a = Net::FTP->new("first.server.address", Debug => 0);
my $ftp_b = Net::FTP->new("second.server.address", Debug=> 0);

$ftp_a->login("first_server_username","first_server_password");
$ftp_b->login("second_server_username","second_server_password");


my $fh = FileHandle::new;

foreach (@file_list) {

        $ftp_a->get($_,$fh);
        $ftp_b->put($fh,$_);
        unlink($fh);
}


$ftp_a->quit;
$ftp_b->quit;
[download]

PS:
Does anyone know how to open a filehandle or filehandle-like object that Net::FTP can stream its data to? Like:

get(remote_file,(put process on other server));
[download]

I tried it with open $fh, "$ftp_b->put($_)"; but that didn't work.