The problem is that multi-star maps are absolutely MASSIVE. There are no mid or small-sized multi-star maps.
There are some small-sized multi-star maps! Agamemnom's Bounty, the 9th small map for 2 players, has only 10 planets and 3 stars, (or 23 'gravity wells', including one hidden system accessible thru a wormhole).
In Dopplegangers, up to four players start in their own solar system, (4 stars) of 8 "planets".
In Systems of War, 4 small systems link to a 5th large, planet rich central galaxy. Again each player starts alone in their own star system.
Or Foreign Invasion, a balanced map with 2 teams grouped together on their own side, 6 players get only 3 planets each. Or rush to control an additional small group of 3 hidden planets accessible only thru wormholes from each side of the galaxy.
My personal favorite is Gateway, where 6 players start in one galaxy, with acess to the large "Xi" system thru the planet "Gateway".