I had the same thought when we first wrote about this topic on our blog. It's not possible to do today.
I have the impression the
HDR via LCC in Capture One was not a fully foreseen usage of the LCC tool. Since the math is already done, and the usage has been very popular (as gauged by discussions with our customers) it's very reasonable to expect a dedicate HDR tool using the same general math (surely tweaked for the new purpose) in the future.
When that future might be, or how that tool might look is anyone's guess. If you ask Phase directly I'm sure they'll say they don't comment on future versions of Capture One.

I find it enormously helpful with my wedding photography and landscape work.
Doug Peterson
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Head of Technical Services, Capture Integration
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