[Plugin: Widget Logic] How to do that ?

Hi,
iìm just installed this kind plug in: it was what i’m gonna to looking for from a while.
My question is:
How to pubblish latest posts widget of any categories only in each category?
maybe i need some other plug in,
amyway every helps is welcome.

Cheers

If somenone has posted already this answer try to excuse me and give me the URL ??