Help with lost dog

Loose dog needs to be picked up. A really sweet dog showed up in our apartment complex last week, either dumped or wandered in. He’s extremely friendly with people, but still figuring out boundaries with other dogs. Several of us have called 311, but no one has come out, and so far we haven’t been able to get him into a car. The community has been taking care of him—he’s recently been treated for fleas and mange, and people are making sure he has food and water. In the past couple of days, though, he’s been getting too close to leashed dogs, and tensions are starting to rise. I’m really worried about the risk of a fight and what could happen to him if that goes badly. He isn’t chipped and isn’t neutered. I’d love for someone here to adopt him, but most residents feel he’s been outside too long to adjust to condo life. Does anyone know of a rescue, foster, or service that could help safely get him to a shelter—or have advice on what we can do next?