Dear Sirs I would like to create a multi-site, where I use

Dear Sirs

I would like to create a multi-site, where I use different themes for the different functions (One WP installation as the main site, and separate for jobs, real estate, etc, redirecting to them from the menu)

Is it possible to create one mobile app from these sites? (have these separate WP installations in one m.app?)

Regards
Sandor