constraint manager setup question

hello

i would like to set up the constraints for diff pairs.

for clines in general, the space is 100um.

the space between clines of a diff pair is 50um.

is there a way to set up a gap between a cline of one of the diff pair and a cline of a different net which is GND?

I would like to set up the gap as 150um.

i have created two spacing sets, one for 100um in general and the other is for diff pairs, 50um.

do i need to create another set for 150um?

i do not know how to set up the constraints for diff pair nets and GND.