use 5.16.2;

my @finalnwlist = ( '192.169.32.0/255.255.255.0',
                    '192.169.72.0/255.255.255.0',
                    '192.169.73.0/255.255.255.0');

my @output = replace_exports();
use Data::Dumper; say Dumper \@output;


sub replace_exports {
    chomp(my @lines = <DATA>);

    my @changes;
    foreach my $line (@lines) {
        foreach my $server (@finalnwlist) {
            my $output = $line;
            $output    =~  s/\*/$server/g or next;
            push(@changes,$output);
        }
    }

    return @changes;
}


__DATA__
/file1 *(rw,sync,no_root_squash,no_subtree_check)
/file2 *(ro,sync,no_root_squash,no_subtree_check)
# shares for Tsp InstallServer
file3 *(ro,sync,no_subtree_check)