Question
is it possible to produce a drosera spatulata by simply putting an in vitro plant'seed in pot

Answer

Drosera spatulata I'm not sure what you mean by the question regarding an "in vitro plant's seed." Seeds can be sterilized and grown in vitro (in tissue culture or micropropagation) but Drosera spatulata can easily be grown by sowing the seed on a moist surface of a suitable growing medium, perhaps in a covered container to help keep the surface moist during germination, without any need for placing the seed in sterile conditions.

I recommend that you ask this and related questions at one of the carnivorous plant forums below, for a variety of helpful comments, suggestions and answers.

CPUK Forum
http://www.cpukforum.com/

FlytrapCare Forum
http://www.flytrapcare.com/phpBB3/

In addition, you may find the information about Drosera Spatulata (including growing it from seed) at the International Carnivorous Plant Society website interesting and helpful--

Drosera spatulata, general information and growing from seed, at ICPS website
http://www.carnivorousplants.org/seedbank/species/D_spatulata.htm

Best wishes,
Steve