Hi Ranjit - I do not know of a good way to get at this at the moment in plain Rhino - it may be possible in a script, I’ll see what I can dig up.
@ranjit - here is a quick python that will select all clipping planes associated with a detail or viewport.
ClippingPlaneFinder.py (995 Bytes)
To use the Python script use RunPythonScript, or a macro:
_-RunPythonScript "Full path to py file inside double-quotes"
@mary - fyi, in case it is helpful…
-Pascal