The dopesheet shows the bone related to the selection. When you select a path, it shows the bone in the dopesheet for that path's slot, as well as all the keyed properties for other things under that bone. The rows for your selection are highlighted.
You can filter the dopesheet to only show deform timelines, but I'm sorry to say there isn't a way to only show the deform timelines for your selection. Can you explain your need a little more? Is it just that you would like less clutter, or are you having trouble box selecting the relevant keys, or something else?
FWIW, in 4.0 the graph gives an alternate way to view your keys and can make some selections or manipulations easier.