Yes, it is
Play BF4 Free on unlimited Trial Accounts
That is the point of using NX spoofer you can create unlimited amounts of trial accounts for free !!!
For that purpose you can use HWID GameTime spoofer (from loader) which generate a new HWID every time and allow you to create a new account in Origin
And that is not only for BF4 but also for BF1, SWBF and some more games in trial...