[fhomess]

I'm not sure exactly what you're asking here, but hopefully this will answer some questions:

If you're not the commissioner of an online league, then only the commissioner can enter All-Star rosters into the game directly. You can't vote for All-Stars in the game as a non-commish member of an online league.

You can vote for All-Stars outside of the game. Some leagues use OOTP:OU or StatsLab to vote for All-Stars. Those are 3rd party utilities that your league website should have a link for. Other leagues vote on their forums or some other method. In all of these cases, the commissioner takes the voting results and enters them manually into the game.

If you're looking for where to select All-Star rosters inside OOTP, then game05's post answers that question.