IP Range Filtering

[Lope]

UltraVNC should have the ability to filter big blocks of IP address ranges.

For example I live in belgium, I want to only accept connections from Belgium.
http://www.nirsoft.net/countryip/be.html

UltraVNC.ini does have Authhosts. But its not designed for doing partial IP address ranges.
Looking at the first range:
62.4.128.0 62.4.159.255
You could say
+=62.4
which would include that range, but much more.
UltraVNC needs a feature to be able to say
+=62.4.128-159
so only that range from 128 to 159 is included.