Yep, they can, and much more. ELWs and ELMs have been found in many interesting configurations, although not every (probably) possible ones. I once made an ELW bucket list thread, with guidelines of approximately how rare the various types are. Plus the ones for which zero have been found yet:
ELW + ELM pair
quaternary ELW set
trinary ELM set
system with five ELWs
ELW co-orbits seven (or more) stars
Y system main star (most likely impossible, habitable zone would be too close to the star)
ELW directly orbits O star (most likely impossible, habitable zone would be too far from the star)
Oh, and Earth-like moons tend to mostly be in orbit of a High Metal Content Planet, gas giant (and other) parents are significantly more rare.