Query in Mahout

Hi,
For item based recommendations in Mahout, is there a way to get recommendations from a selected Product category?
For example:
Product category A: Product1, Product2, Product3
Product Category B: Product4, Product5, Product6

Recommendations for product 2 should be only from category A i.e. Product 1 and 3.So recommendations should be only within the product category.
Is this possible?

Thanks,
Mouthgalya