Not directly, but that information is (sorta) available in the internal data tables. What are you looking to use this sort of thing for? I can see about exposing some additional API methods for you.
What I'd like to do is (eventually) build per-second threat tracking into CombatMonitor 2 for post-combat analysis/graphing. Basically I'd like to end up with a table from [0-n] seconds with the discrete threat values to support the analysis. If threat ability useage was tracked, that'd be pretty sexy for analysing how the tank did in staying on rotation (and rage use efficiency) but I'll bet you don't keep track of the abilities used so that's not a big deal.