If you are asking should the sellers attorney of your new home represent you as well, the answer is no. You should have your own representation.
Massachusetts Premier Buyer Broker
I would not advise using the same attorney for both sides of a transaction.
Associate Broker, Massachusetts, New York, and Connecticut
Berkshire Property Agents
12 Railroad Street
Great Barrington, Massachusetts 01230
Best Of Luck
On a different note if you are using an attorney to sell your home in another state and you are moving to the Boston area I would still recommend that you use a local attorney.
I hope this answers part of your question if not please add more details so I can respond