It is possible to implement Particle Swarm Optimization (PSO) to FCT. If it is possible which part is able to integrate PSO with, for example on classifier update, haar-like feature or somewhere else.
You may get some idea from this article: https://www.spiedigitallibrary.org/conference-proceedings-of-spie/8750/87500S/A-modified-PSO-based-particle-filter-algorithm-for-object-tracking/10.1117/12.2017977.short?SSO=1