Radiesse is a product that requires no allergy testing before use. It is used even in immunocompromised individuals without problems, and would be equally or more safe when used in a patient with lupus. Of course, with any injection there is a (very slight) possibility of infection, but this is usually when bacteria are introduced through the needle stick at the time of injection.
Radiesse consists of 25-45 micrometer diameter microspheres of Calcium Hydroxyapatite (CaHA) suspended in a sodium carboxymethylcellulose gel carrier. CaHA is a mineral substance naturally-occuring in teeth and bones. Over time both the gel carrier and the CaHA microspheres are dissolved and absorbed. The product is aimed at stimulating the patient's own collagen production as the dissolution process occurs over a year or so, which is how long Radiesse lasts for most individuals.
Radiesse is best for nasolabial folds, oral commissures, and cheek, chin, or pre-jowl areas, It is not good for fine lines, wrinkles, or where the skin is thin.
Rather than worrying about how the use of Radiesse might affect your lupus, I would suggest you focus your concerns on finding a board-certified physician who does lots of filler injections, and has extensive experience with Radiesse.