In the DRC check rules box, is there a way to have more than one set of clearance rules for tracks?
(In Kicad this is called 'Net Classes'.)
For example, suppose I have a PCB with a 240V AC mains input, 5V output DC PSU on it and some small signal circuitry supplied from the PSU.
Then for the small signal (5V) tracks I would like rules of 10mil track, 7 mil gap but for 240V AC Mains around the power supply input I may want different rules of 100mil track with 700mil gap.
:)
Brand new interactions and interfaces. 
Easy to use and quick to get started. 
Oh,
This is a really cool feature, It is in our plan, but we can't provide this feature soon. This is big tech. , we maybe provide real time DRC also.
thanks.