No. The private technical preview can be received through your SE's so they will let you know when it is there. In a first wave, we only do a smaller scope of private technical previews (we need to be able to support those thoroughly and potentially remove showstoppers.). Then it becomes a private beta through SE's with a much larger scope.
It depends on your size and plans whether you will can get the first beta or not. My advice... If you really want to test this out as soon as possible, then let your SE know