Short answer
Yes, but be careful.
Nixyum remembers which identity you used in a discussion thread. If you've taken part as one identity and then reply as the other in the same thread, we'll warn you once, because that's how people accidentally reveal they're the same person. If you continue, we won't warn you again in that thread.
What's not allowed is using both identities to fake support: replying to yourself, agreeing with yourself, or ganging up on someone as if you were two different people. That's sockpuppeting and it's against the Community Guidelines.
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