Custom Rule for individual Netclass for different layer

[Jay_Khandekha]

I am using kicad version 6.0.4. I am designing 4 layer PCB which contains differential pairs of 100 ohm & 90 ohm impedance in two different layers. I want to create two netclasses, one for 100 ohm & another for 90 ohm impedance.
I want to create these two netclasses with custom rules in different layers and assign them to their respective Nets. I have tried some of the custom rules which i am atteching below but i am not getting the result from any of them instead i am getting the results of default netclass that i have set for the other nets other than the differential nets.
(Here i have not considered the actual trace width, clearance & diff pair gap for 100 and 90 ohm impedance for testing purpose)

1. Here i have used USB_P & USB_N with 100 ohm differential impedance.
   (version 1)
   (rule “diffpair”
   (layer F.Cu)
   (condition “A.NetName == ‘/USB’”)
   (condition “A.inDiffPair(’’) && AB.isCoupledDiffPair()")
   (constraint diff_pair_gap (min 0.25mm))
   (constraint track_width (min 0.1mm))
   (constraint clearance (min “0.05mm”))
   )
   (rule “diffpair”
   (layer B.Cu)
   (condition “A.NetName == ‘/USB’”)
   (condition "A.inDiffPair(’’) && AB.isCoupledDiffPair()”)
   (constraint diff_pair_gap (min 0.2mm))
   (constraint track_width (min 0.1mm))
   (constraint clearance (min “0.05mm”))
   )

2. Here i have used USB_P & USB_N with 100 ohm differential impedance.
   (version 1)
   (rule “diffpair”
   (layer B.Cu)
   (constraint diff_pair_gap (min 0.3mm))
   (constraint track_width (min 0.3mm))
   (constraint clearance (min “0.1mm”))
   (condition “A.inDiffPair(‘USB_P’) && B.inDiffPair(‘USB_N’) && AB.isCoupledDiffPair()”)
   )
   (rule “diffpair”
   (layer F.Cu)
   (constraint diff_pair_gap (min 0.2mm))
   (constraint track_width (min 0.25mm))
   (constraint clearance (min “0.1mm”))
   (condition “A.inDiffPair(‘USB_P’) && B.inDiffPair(‘USB_N’) && AB.isCoupledDiffPair()”)
   )

3. Here i have used USB_P & USB_N with 100 ohm differential impedance.
   (version 1)
   (rule “diffpair”
   (layer F.Cu)
   (condition “A.inDiffPair(‘USB’)”)
   (constraint diff_pair_gap (min 0.4mm))
   (constraint track_width (min 0.1mm))
   (constraint clearance (min “0.05mm”))
   )

4. Here i have created Netclass for 100 ohm & 90 ohm differential pair.
   (version 1)
   (rule DIFFERENTIAL90
   (constraint track_width (min 0.5mm))
   (condition “A.NetClass == ''DIFFERENTIAL90”))
   (rule DIFFERENTIAL100
   (constraint track_width (min 0.15mm))
   (condition “A.NetClass == ‘DIFFERENTIAL100’”)
   )