Show different categories with [category]

Hi there,

I use custom template 1 and want to show in one row some special categories and in a second row some other categories. It would be fine if I could use [category cat=1,2,3] in row one and in the second row [category cat=4,5,6], but it doesn′t work.

The output would be something like this:

animals, pets, birds
tiger, lion, cat

It is possible to do some filtering like this?

Thanks
Sebastian