Hi,
Unfortunately it is not possible to use the materials IDs on Clipping paths with the limit to Material IDs option. This is by design, Limit by material IDs is not intended for use with clipping areas and only works with X/Y splines.
This is because there are difficulties resolving a situation whereby a clipping path may have multiple IDs on the same spline, but also many users use clipping paths in conjunction with X/Y splines that may themselves use the limit by material IDs option to place segments.
I hope that helps to clarify this behaviour,
Thanks,
Paul