أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
Both are correct..All depends on the contexts where they are used
I think that both are correct.the only difference is the place of the phrase.If it were at the end of a sentence,I would prefer to claim.If there is a completion,I will prefer who claims
For anyone to claim - refers to an idea in general - use of the infinitive to claim
For anyone who claims -refers to a specific case that is being discussed