No such thing. It's just a static particle field. However, given that these days thanks to the unified renderer and designer UI multiple instances can easily be combined to exist in the same space, nothing stops you from creating multiple custom maps. The same would even be required in particular if you used layer grid emitters, as some options preclude others. Otherwise perhaps this is the moment to consider a genuinely modular system like Stardust, where this stuff isn't plugged on as an afterthought like in Particular. That is of course if you realyl need it that desperately you would be willing to spring the extra cash.