You can add entity's to segments.
So segments can contain both. I am not sure if these entity's would become static or not (never really had any reason to do it)but reckon since your adding the models fpe settings to the segment they should remain dynamic.
Even so with regards to above screenshot, it looks like there are dynamic windows and doors added to the segments in the scene (it may be that a segment wall inherits dynamic properties of the door through boolean cutter or simply that colour as its been cut and has nothing to do with dynamic).....so yeah

Seems no one has a definitive answer to this.