Not quite. Adventures created for a convention. (CCC=Con-Created Content)
The idea is that a convention's organisers can write their own D&D Adventurers League-legal adventures to debut at the convention, as long as they get approval from the DDAL admin team (the process must begin at least 9 months before the convention) and then put the adventure up on the DMs Guild within 6 months of the convention.
The DDAL admins don't oversee the quality of the adventure, although they do approve the original concept.
So, Baldman Games has a team of writers that create content for their conventions, and many other conventions have been joining in with their own CCC adventures.
So, a Con-Created Content adventure will premiere at a convention, then become available to everyone once it goes up on the DMs Guild.
The difference between a CCC adventure and a DDAL adventure is that the DDAL adventures are specifically commissioned by the D&D Adventurers League itself, and are edited by the admin team. CCC doesn't have that much oversight.
Cheers!