8.3 version of NetBalancer App adds one important improvement to Rules: IP Enumerations, for both local and remote IP fields.
So now you can create one single rule to manage the traffic from/to multiple IP adresses and ranges.

Here is an IP Enumeration example:
192.168.2.1, 100.100.2.0/24, 201.201.0 - 201.201.255.

As you can see an IP Enumeration can be any mix of IPs, IP ranges and CIDR notations, comma separated in any order.

Try the new IP Enumerations feature.