Just to be clear: the clipping warnings and histogram in lightroom are tools for development of photos. Not for analysis of the RAW-files itself. The warnings does (in the best case) warn you if you're clipping in the output format such as JPEG.
The histogram works the same regardless of which module you're reviewing it in. In Lightroom the histogram reflects a "gamma corrected ProPhoto RGB matching the Tone Responce Curve of sRGB" (as explained in this paper) and therefore not reliable as a sole indicator of clipping. A gamma corrected histogram has a lot of other uses though as our eyes has not a linear response to light while digital sensors largely have and the gamma correction acts as a transfer function between them. This paper from Adobe explains this very well.
The accuracy clipping warning shown as blue for shadows and red for highlights depends on what space you're exporting the final image to. As Lightroom uses MelissaRGB (that is ProPhoto RGB with sRGB Tone Response Curve) it's highlight warnings are based on that. If you're exporting in sRGB there may be areas that are clipping in sRGB but not in MelissaRGB. Look at this article for examples of the problem.
The camera that you're using does not matter for the simple reason that you're working with raw files. Lightroom therefore handles all processing and the clipping indicator tools work the same,