Offset curve on surface: it can be done?

I do not know what happens in Rhino 6… you could add the ability to select more than one curve, not only a curve at a time? Example: if you have many edges, it’s frustrating having to perform an offset on the surface one at a time; it would be more practical for you to select the ones that interest simultaneously.

It would be possible?

the maximum would be if the command could also work for polysurfaces.