Is it possible to process the data at a same time on one receiver unit coming from more than one transmitters in its range. particular in RF applications which kind of modules we can use, i mean zigbee or 433MHz ASK RF module or any other kind of RF module??
If possible than, how can we communicate from more than one transmitters with receiver at a time. how we can specify particular kind of transmitter?
You asked a question, you got an answer. You are being negative by not accepting the truth and instead arguing as if you know the answer to the question you asked in the first place.
In general a receiver can not receive data from multiple transmitters precisely simultaneously. It is possible to construct networks with multiple transmit nodes by, for example, time multiplexing the transmissions such that only one of the nodes is transmitting at a time, but others follow in succession. In many contexts this multiplexing is indistinguishable from multiple simultaneous transmissions. The question then is whether this particular application truly needs simultaneous transmitters or if it requires multiple transmit nodes.