I wish that were the case, but it seems to be random. Just as an example, I selected the (Team 1) lineup by position order, seen in the picture.

Yet in the game, these are the positions they ended up playing. Maybe it can be fixed with a roster editor.
PG - Deandre Jordan
SG - Michael Beasley
SF - Carlos Boozer
PF - DeMar Derozan
C - Nate Robinson