No. The 'filter' is not a blue light filter, it's really just a shutterglass. The blue light protection pimax has is the 'cool colours' option, which is disabled by default so that there's less bluelight. It's just like modern monitors usually have as an option.
It also makes no sense to install a filter if you can just dim the panel and adjust blue light electronically, why would you install an extra sunglass ?
Of course, since any shutterglass always is dark, like a sunglass, it dims brightness and in that way your eyes will receive less blue light, so if you look at it like that, yes it lessens blue light. But again, if that was Pimax's goal, they could have just dimmed the panel electronically.
There still is a health reason though why you, at this moment, could prefer the shutterglass: low_level_2 is still brighter without filter than 'level_normal' with filter and there is no lower level configurable at the moment.
I've thought about adding it but it's difficult without having the panel's datasheet.