I do not believe it is possible at this time...
There is somewhat of a workaround:
As you build your topology you can use the seam tool to separate the edge loop faces. Just do not unwrap.
The choice of colors is auto by 3DC and the loop faces colors can change at times if you delete some seams.
Once completed with the retopo, clear your seams.
I changed my seam selection color to white under the preferences menu.
Remember this is just a workaround. A feature request would be what you need to do.
Do not view the picture as quality retopo and edge loops separation. I just used an autopo and then built on that to only demonstrate the process. Very busy this morning but did at least give you an idea.
Since you would be building quality edge flow, you should be able to place loop seams easy and keep a track of your topology flow.