I'm still not clear on your setup. But if I'm following you, this might do it. It's not pretty, has to go in the top of every CGI, but it will allow you to use local::lib locally and on your host without messing with apache or apache's ENV.

#!/usr/bin/env perl
use strict;
use warnings;
my $local_lib;
BEGIN {
    $local_lib   = $YOUR_XECU_LOCAL_LIB_DIR if -d $YOUR_XECU_LOCAL_LIB
+_DIR;
    $local_lib ||= $YOUR_HOME_COMPUTER_LOCAL_LIB_DIR;
};
use local::lib $local_lib;
# ... your script ...
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