FakeIdentity, ChameleonIdentity, IdentityObfuscation
Person with a Diaspora account is represented in the Hubzilla stream with different identities depending on the context.
Core developer in the Diaspora project Dennis Schubert shares upon request:
diaspora* attaches a signature to every item sent over the federation layer, and diaspora* verifies this signature on receiving any item. You cannot forge this signature without having access to the accounts’ private key, and you cannot federate anything without a signature or with an invalid signature inside diaspora*.
If Hubzilla fails to validate signatures, or somehow internally mis-attributes a post/comment to another user, then that’s a bug in Hubzilla that should be raised with Hubzilla.
s. . Detailed description of the error with screenshots see discussion on the topic in the developer forum  and in "Hubzilla Support Forum"  (german).
 FakeIdentity, ChameleonIdentity, IdentityObfuscation, 09.09.2021 - https://discourse.diasporafoundation.org/t/fakeidentity-chameleonidentity-identityobfuscation/4163
 discussion on the topic "Fake identities in Hubzilla" in the developer forum, 08.09.2021 - https://zotlabs.org/item/3239ebe5-239b-4178-b281-44e0c7c6b967
 Diskussion zum Thema "Fake-Identitäten in Hubzilla". (german) 08.09.2021 - https://zotadel.net/activity/545037ba-6473-4c83-a19f-2debf626580f?