I personally have no issue with posts from different accounts following each other, even though both accounts are owned by the same person.
What I would suggest is that we adopt a rule of thumb: If your characters have three posts in succession collectively (e.g. Tora, Ash, Tora), then give it a break and let someone else post. And in conjunction with that, let's adopt either a 3-day or 5-day wait period before the same player posts again. I would personally opt for the shorter duration: I want to see a balance that will encourage more people to post but not discourage story progression.
I would also like to see us allow some time, at least, in between same-player posts: say five hours?
So, in the morning Tora posts, in the evening Ash posts, the next day Tora posts, and three days later Tora (or Ash) posts again. That would be all right, provided it moved the story along. But Tora or Ash posting merely to "bump" the thread would not be as acceptable.
Of course, any other player posting in the midst of all that resets the post counter to zero.
I think if we all use common sense, we can use our multiple characters to good advantage to keep the story alive.
A word of caution: In the SL version of the RP, we were explicitly told not to interact with our own characters, to avoid "crossover." Crossover means your character A would benefit from information they can get from your character B, and so you use your OOC knowledge to have character A get that information from character B, when ICly the two characters would have little or no reason to interact that way. Not that this player has ever done anything of the sort.
It can also mean setting up relationships between characters primarily for the purpose of passing information from one to another.
A forum situation poses some additional challenges for us: We are all going to be party to OOC information as we read the posts of others, with their descriptions of inner dialog, activities outside our ability to observe, and the like. So the crossover concern goes beyond interactions with our own characters. I do think we can handle this, and handle it well, and deal in good humor with the occasional "oops."
One other comment on same-player posting: I anticipate that occasionally a special-purpose thread will end up containing posts primarily from a single author. An example of such a thread is . Such threads are acceptable, and the authors are not necessarily subject to the same posting restrictions as regular story threads.