HTML TEMPLATE sub-domains (one product) - licence

I want to buy a theme for Q&A system (Question/Answers).

I want to make it more than sections (Programm , Designer , …etc)

The Main idea is : asking question and the members will ansers

but every sub domain have a category


but in fact they are in one host/domain/database and same script/application.

I will programm a script by laravel which will deal with sub domain like (category).

now , I want to choose the licence , but I don’t know what is the licence for my project?

One License is for One domain - you can use it for your all sub domains - which was used in main domain.

thank you very much.