In Anim8or, not specifically. I also did a brief look through the scripts, but there's nothing that does that specific action.
The easiest means of bridging two edges would probably be to use the Topographical Knife tool (found in the newer development releases in this forum). Basically you enable the tool and then left-click on one point, then hold Ctrl and left-click on the point of the other edge to connect them. Then do the same for the other two points of the edge.
Otherwise use the Add Edge tool to add edges by clicking and dragging between them, then select all the edges and fill holes (Shift + J).
I *can* make a script that automatically bridges between two edges, but it's not really a time saver compared to just using the Topo tool, unless you want to automagically bridge a lot of edges at one time.