much Portfolio pages filterable by category

Good afternoon. I can only express your theme is totally cool and beautiful. Very good job.

But I’ve been with a headache:
I’ve been trying to create a portfolio of posts vary according to category, which wanted a page to a category, and another page another category and so different.
The detail is that, according to the excellent update you elaborate, I can only enable a single category. And every product portfolio is repeated the same category.

Is there any way I can modify and to achieve this goal?

Seeing him like that, it would be desirable to have a custom field template for product portfolio that may indicate the category to filter.

The rest everything is going perfect. Thank you very much and successes.