I think you can select the lashes in polygroups(not on my ZB pc) and ctrl/shift. This may not be safe from the tools if it is not locked AND invisible.

,, but another way is to simply dial eyelash length into negative before exporting it...

Eyelash length...-3.000. If you just export the head you don't even have to worry about material groups, UVmapper,,,et al

Just pop back your eyelash length when you bring it back.