From what I understand, if you play solo/coop/semi-coop then yes, as soon as you have 3 birth tokes each player gains the 4th colony marker, and in the next supplementation phases you add 1 more hunger token (regardless of no. of players).
Only in competitive mode each player needs to have its own 3 birth tokens to unlock the 4th marker (because comp. is the only mode where the qaurters are NOT shared).
Thanks, clear this, and what when one colony is turned into dead side? You deduct one hubger token?