I’ve always been curious about this even though I’ve never been in this situation.
On Reddit, there are things they ban you over if you do them with alternate accounts, like voting for the same option on a poll, adding multiple upvotes to a comment, and so on.
Meanwhile, as being a mod comes with duties, Reddit specifically asks you to approve or unapprove posts in your subreddit. For the most part, approving a post doesn’t seem on par with rigging results, but I’m guessing that because posts being approved gives automod the impression that an account is trustworthy, it could be deemed as amounting to an indirect form of rigging.
And yet, on the other hand, it is technically your subreddit, and even your own posts (as subreddit owner) make you choose between approving and unapproving posts.
What happens then if you have an alternate account, use it to post in a subreddit your main account owns, then approve it with your own account which owns the subreddit?
AFAIK that would be ok, a lot of subreddits don’t even require the posts to be approved, so that would be the same as setting your sub to not require approving and posting to it with a different account.
Note that, unlike reddit, lemmy shows negative vote values. So it may seem a bit more dramatic compared to reddit.