Wild -- the forum must have his IP address, no?
but efforts to inquire about this information have been harshly discouraged (or more often, just sent to dev/null) by anyone close to such sources.
plus years of time elapsed between bitcoin-the-obscure-niche-project and bitcoin-the-global-progressive-lotto-jackpot, and logs etc may have been flushed before anyone recognized the significance of what they would reveal.
20 years from now, digital archeologists trying to piece together the real origin story of bitcoin will have their work cut out for them.