A good WBS is the core to most schedules and the ability to quickly filter by WBS levels or groups is a much used feature in P6 and other scheduling tools I would like to do in Synchro. The current work arounds I use are 1) Manually select the desired task and create a filter and manually reupdate it every time I get a schedule update, or 2) Do a custom filter on the WBS Path column in the task table and save a layout.

#1 is manual and leaves room for human error
#2 is easy to lose track of since you cant see it with the rest of the task filters in a list