This is called "traffic cop" in marketo land.
But unless you show us screenshots and describe the requirements, we can't help.
I'll have a crack at explaining what I'm attempting to do here. At this point I want to simply route traffic to either 'no nurture' a 'local audience nurture' or a 'global audience nurture'. I've created the no nurture track because we don't have enough info to assign a nurture track and I want to send those people a general email that will allow me to capture their location and bring them back into the nurture.
I've built 2 smart lists to filter local audience and global audience and have created a flow action (as shown below). I then want to be able to set nurture flow actions bringing them into the relevant engagement programme and stream.