I really don't know if this specific sensor will work or not. We support standard binary switches so one of the relays might show up, but most likely not both.
Basic Z-Wave devices tend to work quite well with the Almond+, i.e. single function devices. We haven't added support for multi-functional devices as yet, as it's a lot more complex on our side, but it'll come.
In this case, it's a multi-functional device, as it has two switches, so the UI would need to understand that and accommodate it, which it currently wouldn't do.
It's not about adding manufacturer specific support, it's about adding device class/type support, as there are a lot of different types of devices out there, the Z-Wave alliance claims over 1,000 certified devices and many of them are non standard devices that most gateway/controller manufacturers wouldn't be supporting.