Lately, a few times I ran into situations in which I had the strong impression a single user represented himself in multiple user accounts, for example:

• A user asks a question. The question is answered, and another user communicates extensively about the answer (with the answerer), giving the impression he is the "owner" of the question. The answer is altered a few times until the (seemingly "third party"-) person is satisfied, and immediately after that, the answer is accepted by OP.
• Another situation is this one where I saw (In my opinion) a not-so-good edit. Curious to who might have approved it, I found out OP had. I also noticed the use of language of the edit was quite similar to OP's.

Apart from the question if these two cases were done from one and the same person or not (of one it became clear in the meantime), it raises the question: is it allowed to have multiple representations of one user?

Lately, a few times I ran into situations in which I had the strong impression a single user represented himself in multiple user accounts, for example:

• A user asks a question. The question is answered, and another user communicates extensively about the answer (with the answerer), giving the impression he is the "owner" of the question. The answer is altered a few times until the (seemingly "third party"-) person is satisfied, and immediately after that, the answer is accepted by OP.
• Another situation is this one where I saw (In my opinion) a not-so-good edit. Curious to who might have approved it, I found out OP had. I also noticed the use of language of the edit was quite similar to OP's.

Apart from the question if these two cases were done from one and the same person or not (of one it became clear in the meantime), it raises the question: is it allowed to have multiple representations of one user?