Because licensing is different for each piece of software, you should speak with a representative from the company the software is sold by.  This way you can tell them your situation, and they will know how you can best cover your user licenses.  If you have questions about Microsoft software, you should speak with your local Microsoft License representative.  

Miguel,

Necessitas hablar con un representante de Microsoft por preguntas de licensias Microsoft.  Licensias por software es differente cada producto.   Mejor que hablas con la compania que vende el producto de software.