multiple receiver and transmitters

Hi, Im hoping someone will be able to point me in the right direction, Im looking to toggle one output on several receivers by having a seperate push button for each receiver on the transmitter. Also I want to be able to use the option of up to 5 transmitters. I am quite knowledgable in electronics but havnt been able to achieve this yet and im hoping someone may give me some ideas.

Thanks in advance

Clive