[galaxy-user] conditional cluster/merge

Hi, I have a dataset of some 1000 individuals and I'd like to merge consecutive intervals within 50kb that are within an individual. I know how to do it per person (first filter an individual into one file, and use the "cluster" function at the "operate on genomic intervals". But to do this in 1000 times is obviously not ideal, unless it can be automated. Either that, or perform cluster/merge with an additional condition (only merge for intervals from the same individual). I'm an experimentalist without programming background, so I rely on using galaxy to perform my analyses. I'm wondering if you have any suggestion for this?

many thanks in advance! AW