The only options I’ve found that both execute as the user, and run elevated, require you to supply the user’s password.
It is possible to run as LocalSystem, elevated, while providing an interface to the logged-on user; this is dangerous from a security perspective because a graphical installer might provide a way for the user to elevate their privilege, so that should be used with care.
The options I’ve found are summarized at Tip - Action Override User settings