Is there any way i can switch the serial lines to control each seperatley with a single serial out from the uno?
What do you mean by "switch the serial lines"? There is one hardware serial port that you can use to talk to one serial device. You may be able to use other pins, and SoftwareSerial, to talk to other serial devices.
SoftwareSerial only allows listening to one device at a time, but if two way communications is not needed, then there is not problem talking to several devices, one at a time.