I wonder if you can sue someone of the same sex for sexual harassment.
Literal
Same-sex [object-を] sexual-harassment [by-で] sue [nominalizer-こと] cannot-do [wonder-のかしら].
のかしら is a feminine wondering form — explanatory の + question か + feminine wondering しら. セクハラ is a clipped loanword from 'sexual harassment,' universally understood in Japanese. The potential negative できない is missing が after こと — in casual speech, こと(が)できない often drops the が.