Very easily, if I understand your question.
You're just asking how to have the player start on different parts of a map depending on the way he enters it? Well, he's sent to the map via an event of some sort calling a "Teleport" action, no? All you need to do is (in that same event) add a "Set player coordinates" action which moves the player to the correct part of the map. Just use a different event for each way that the player can enter.
Or, if you're just wanting simple "if I walk off the left side of this map, I wind up on the right side of that map" (a la PoG), just use auto-switch locations in the location editor.
Hope I helped.
------------------
"A scientist can discover a new star, but he cannot make one. He would have to ask an engineer to do it for him."