Yes, as an organiser you can restrict attendees entry for a particular session by using the "Control who can join" session.
Kindly refer to the help article - Control who can access your event session (restrict session-based entry)
Restrict other attendees from the session. Only a host and co-host have these rights.
If they find someone spamming/abusing, they can report the person and then the host can block them.
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