I don't use KiCad; however, a quick search on version 5.1 seems to indicate that you cannot hide a specific net, as you can do with Eagle. One idea is to move that net to another layer then change it back when done. Alternatively, you can highlight the ratsnest for the net on which you are currently working.
I'm sorry I am not sure which problem you are refering to and I dont think I am trying to hide a net?
What I mean by my first question is that I cant route the track I am currently tracking in the screenshot to J3p2. I cannot click it or any other place with power.