Sending multiple channels with bluetooth
The BT module will connect as a SPP (serial port) device, and then pass the serial data to and from the arduino and whatever you choose to connect to (that supports SPP). 

There is only one channel, and in any case only one set of TX and RX wires that will be connected to your arduino, but this does not stop you from sending as much data of as many different types as you want. You are only limited by the BAUD rate and how much time the message will take to send. 

For complicated data transfers you will need to write the code for a protocol so both sides can make sense of what the other says. You are free to do whatever you can think of here, although if you need to make a complicated protocol you might get some use out of the answers to this question:

Communication Protocol Best Practices and Patters