KM News Filtering

Hello

We have new requirements in our portal. The main requriement is inserting news.

We´ll have 2 type of users:

-Administratos who will create the news. News will be of 3 different types, R/3, BW and Sales

-Clients from R/3, BW and Sales that will read the news.

One of the requirements is having 3 different iViews having the news separated for each kind of client, for example, Sales people will only have sales news.

Ho can I do this? Filters? Taxonomy?

What´s the best way? We may need more division of news in future releases.

Is there any example on how to do that.

Thanks very much in advance for your help.

Regards

Fernando