SoC Encounter via array.

There is a layout to be routed with a constraint on number via 6 in
encounter.
(It could be 6 X 1 or even 2 X 3 which ever is possible)
Is there any option for setting this in the sroute - wroute or nano
route ?

 

correction
number of vias to be put on each net = 6.
-ak