Forum is now fully separated from Bitcoin.org. So, the admin directly can't spend forum funds for Bitcoin.org. But admin could donate on behalf of this community. The below quote is a quite clear explanation.
I no longer have any access to the bitcoin.org domain name, and Cøbra no longer has any access to the bitcointalk.org domain name. The two sites should be viewed as totally separate, which in practice they have been for years.