Beyond Ian's response on the C1 Saturation control (which is also my understanding) you can tweak colours individually with HSL adjustments using the Colour Editor tool. These changes can be limited to distinct saturation ranges of the colour (but not tonal ranges) when using the Advanced or Skin tone tabs (drag the outlines of the pie wedges that are created when you use the eyedropper to sample the colour you wish to modify). The colour selections you create with this tool can be turned into layer masks for Local Adjustments (click on the ... in the upper right corner of the tool) and then you can modify many parameters with multiple tools.
If you want to tweak the colours in darks, mids and lights separately you can use the colour balance tool, but with this you can only modify hue (by overlaying a colour cast) and lightness. There is no direct saturation control, though overlaying complementary or supportive colours will give you some control over the overall intensity of colours in these tonal ranges.
Regards,
Richard