Community of owners cannot impose fines. Only the Public Administration and Judges can do so. So, even if the Community decides to impose a fine, if the owner do not pay, there is no way for the community to force the owner to pay. Then, what for?. But, there are other ways to force the owner of dogs to “behave”, dealing with this issue as a “nuisance activity” (actividad molesta).
Installing cameras is possible in a private property, although you have to fulfill several regulations. It is, then, advisable to hire a well known company to take care of all the formalities: i.e: Malaca, Prosegur, etc.