@serdem, i did not find something to do it and think this is still open to be added:
https://mcneel.myjetbrains.com/youtrack/issue/RH-32856
https://mcneel.myjetbrains.com/youtrack/issue/RH-34047
but there seems a way using RhinoScript (rvb) in the WIP using
Rhino.ClippingPlaneView(strIdOfClippingPlane)
If this is an option you might continue reading here
In V5 there are native commands _EnableClippingPlane and _DisableClippingPlane which could be used in an active viewport, however this requires that the clipping plane is selected and you script the commands…
c.