jakerobbins and Robkk, thanks for the reply.
I understand it can be hidden with template customize or css customize.
however for maintenance reason (bbpress update etc.) I would like to know the way by filter.
some customize has already done by add_filter except bbp_anonymous_website.
thank you.
I appreciate your early help Robin.
However both didn’t work.
Website field still appears.
I have corrected ‘ to ‘ but fully copied.