This report workspace can be used to investigate which internal persons a researcher is collaborating with (in regards to research output)

Driver content types is Persons. Use the Person filter to filter down to the research you would like to investigate 

You can add multiple persons to the person filter to investigate who they are collaborating with. Or you can remove the filter on column A and instead a filter on organisation - to investigate who a group on researchers are collaborating with.

Download example file

Screenshot