You cant do it in the same layer, but you can use more than one layer, one for the bumps one for the displacement. I didnt try it for a poser figure, but I tested it on a sphere, see attached image. Here I distributed the disp/bump layer using the environment tab. The displacements are on the high altitudes and the bumps on the low altitudes. You could also try with a mixed material and define the location of each with a distribution map.

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