You can download the source code for Wireshark's older versions here
for example. You'll have to check if it all works after compilation. Do you have any particular reason why you want to use such an old version (over a year old) which might contain several bugs that are fixed in the latest stable release? Another thing, Fedora 11 has reached end of life and is thus unsupported
little over a year now. I suggest you upgrade to the latest release.