Is there any way to know this or not?
No.
Lauda is controversial topic in this forum, and I don't know anything personal about this member.
When I came to this forum, almost everyone who talked about Lauda said "he", then at some point everyone start saying "she" and, lately, he/she and sometimes he/she/it.
But if you really like to know, read Lauda's post in Croatian section. I really miss his/her/its posts.