Interesting. I find I can freeze comments individually on a personal LJ. I can also retroactively disable comments, or screen them, and I can change the security on an entire post. Each of these options is available on the "edit post" page.
I don't administer a community LJ, so I can't speak to how those work.
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Date: 2014-01-31 09:05 pm (UTC)I don't administer a community LJ, so I can't speak to how those work.