Hi Marcio @mdias,
I’m not sure if it’s a limitation of Excel IA or of principle of data feeds for collections, but it is indeed not possible today, using an Excel file as a data source.
Let’s say you have 1 collection with 5 artists. Each artist would have its own set of pictures, meaning 5 different collections, each requiring its own data source.
When you use a data source (Excel sheet, web service, custom Interface Asset), you get only 1 data source. If you apply a filter on it, it’s still 1 single data source. That’s because the filter is applied on the data itself, at its source, and not on the collection or at the view level.
This is something that might evolve on the long term, but today, this is how collections & data feeds work.
Today, If you want to display at the same time 5 different lists of photos, 1 per artist, you do need 5 different data feeds.
The alternative is to display only 1 of these lists at the same time, then the current filtering mechanism works.