Limiting Options on Random Town Maps

[JagoBC]

Has anyone managed to limit a player's choices when selecting a race on a map that has that player's starting town set to random? For instance, I made a map and want to limit Red to being either haven or sylvan, blue to being either Inferno or Academy and Brown to being either Necro or Dwarf. But I can't figure out how to set the limitations (also, multiplayer, so no scripting allowed). I recall that in H4 you could set the random options to just a few races. Did they leave that out of H5?

Thanks