I'm running not-quite-up-to-date Xfce. If KDE 64bit RC1 doesn't work this way, you might find the answer in the same file.
And, I'll admit I don't know much about Proftp or PCC (or perl), but PCC does not read and modify proftpd.conf. Every time I use it for a mod a new proftpd.conf is written based on the options in the script.
/usr/lib/perl5/vendor_perl/5.10.1/MDK/Wizard/Proftpd.pm
Lines 256 - 262
if ($wiz_ftp_internal && !$wiz_ftp_external) {
($allow) = $wiz->{net}->itf_get("IPADDR") =~ qr/^(\d{1,3}\.\d{1,3}\.\d{1,3}\.)\d{1,3}$/;
$allow .= " 127.0.0.1";
}
elsif ($wiz_ftp_external) {
$allow = "all";
}
So, there's the options: 127.0.0.1 or all.
If I change
$allow .= " 127.0.0.1";to
$allow .= " 192.168.2. 192.168.1.200 127.0.0.1";
That's what is written to proftpd.conf.
That's a root edit and is in effect until changed in the script. And note: there's a space between " and 127, although it may not be needed.
Tom