The answer is yes, it can, but the notes that others have posted about tip necrosis are a minor issue. In my opinion, the risk of tip skin necrosis is so low that fillers to the tip are reasonable options. The majority of studies to date describe radiesse for non surgical rhinoplasty, but fillers like restylane and juvederm also apply. And because restylane and juvederm are reversible, may be more straight forward.
The issue that I feel is more important tries to define what realistic improvements are achieveable. The fillers can add some diffuse fullness to a tip, but not the definition that patients often desire. Or, attempts to create more of that pointy tip that some patients describe (ie more definition) require volumes of filler that are less predictable. And an article by Toriumi describes the difficulty in removing radiesse if a patient quickly follows with rhinoplasty.
So in the end, I do use it in the tip, feel it is safe, and effectively adds tip volume. Definition is harder to promise.
Dorsal (bridge) augmentation works much more reliably as well with all the fillers.