Not explicitly, no. But here's what you could do instead:
Put your read only section on a new page and protect it. Transclude the contents of that protected page onto the primary page. A user would still have the opportunity edit the primary page and entirely remove the section, but they cannot edit the contents of that section.
If your protected page is named MyProtectedPage, then you'd put {{:MyProtectedPage}}
on the primary page to transclude it.