What efforts have been made to separate the microseismic events related to wind-related ocean waves from the components of volcanic origin?
There have been several studies regarding the separation of volcanic and water-wave (surf) microseismic traces, recently a study was performed exactly as you asked - using and comparing data from several sensors. 

A recent study at Pagan Volcano in the Northern Mariana Islands (1) demonstrated multiparameter seismo-acoustic observations of long-period signals from seismic, infrasound and buoy data can not only determine the azimuth to the source of the mcroseism disturbance, but can provide a means to compare the frequency typical of surf and those that are 'normal' for the volcano.

One of the major differences they found was when a typhoon passed 770km away from the sensors, these clearly showed the difference in the signal that ocean waves have on local surf induced microseisms - causing a peak that is not present on the volcanic microseism (as the volcano itself is not directly affected by the surf). In fact, the storm track could be tracked, something that was also done during Superstorm Sandy (2) - which presents another signal that is very different to volcanic microseisms.

The research and observations suggest that a feasible way of determining the origin of the sources to microseisms is to have an array of types and spacing of sensors.

References

(1) Lyons et al. 2014, Distinguishing high surf from volcanic long-period earthquakes, Geophysical Research Letters

(2) Sufri et al. 2014, Microseisms from Superstorm Sandy, Earth and Planetary Science Letters