And how can i achieve that?

Thanks for the answer, but i found some facepunch threads where people just said that you just need to do another material slot. And since materials->vmts with possible different textures with different , and that they're writed in the smds for each row, why isn't that possible?

So, after i saw the smd format, for the materials i just need to assign and select an uv map in the texture menu, but i tried several times(with both materials) and in the compiled model it's only visible ( correctly placed) the selected UV in the object menu.
Edit: since uv map is transferred per smd row, just join the objects, it will merge the UV, overlapping if it's necessary. Just separate the materials. Sorry for such a foolish question.