On the real instruments, I think you’re supposed to damp the strings with the hand as needed to avoid that problem. Basically the same situation as with cymbals, chromatic percussion and the like. Some have mute pedals for that. (Like an inverse sustain pedal, as they obviously can’t have key operated per-note dampers like a piano - though some VIs emulate that behavior, to make life easier for keyboard players.)
It doesn’t seem like Elysium has a literal damping feature, but you can implement it in a limited way by reducing the Release time. The reason this works is that the Release time is ignored when you play with the sustain pedal down, so set up like that, it kind of behaves like a piano.
It still seems to add new voices when plucking the same string repeatedly with the pedal down, which is not optimal, but that’s kind of how it is with samples; that bit is not realistic no matter how you turn it. Unfortunately, it doesn’t support half-pedaling (analog CC64), and once the release envelope is triggered, it runs to silence, so “short pedaling” doesn’t work either. I suppose you could work around it by automating the release control instead of using the sustain pedal mechanism to reduce the build-up in such situations, but that of course leaves the last few notes ringing non-interactively.