Should not be a problem, I've kept several different jawfish species together and as long as they can each burrow they don't seem to bother eachother.
I've colleced several sp in the wild and something interesting to know is how they live in the wild, they are all colonial, with their burrows being close together (some sp closer then others) but each sp is seperated by bottom type. The duskys are almost always in a hard top, with their burrow made from an natural crevice which they bring stone and sand to to fortify the opening. pearlys build their burrow on sand flats where they find a burried flat stone to be the roof and build a tunnel out of pebbles and rubble to make an oppening. Other sp also have their favorite sites like bandeds live in rubble fields and just make a cave out of branching coral chunks and rocks which they spit sand over to form the whole structure. Blue spots do the same, making digging them out hard as the structure just collapses when you try to dig them out.