Hey Beyond L.,

Generally speaking forwarding to multiple xbox ones using a single external IP address is impossible because they both require the same port. You should be able to forward to an xbox and a playstation at the same time with no problem.

However, getting a port forward through a satellite ISP is not usually possible. You may want to contact your ISP and ask if they support incoming connections. Most do not, but it's possible that yours does.

Further complicating things, while Mikrotik router's are amazing, they are quite possibly the most difficult router to work with. I used to have one myself when I had a wireless ISP and it took me quite a bit of work to get it to do what I wanted. Mikrotik router's are much closer to "real routers" than your standard home office stuff like DLink and Netgear, and as such they have some pretty advanced options. We have never been able to add PFConfig support for Mikrotik, but we have managed to setup some forwards manually in them.