I have already tried gwibber,twitux, destroy twitter,smuxi,gtwitter,choqok,qwit and hotot.
only hotot could configured sock5 proxy but not all traffic over sock5 (I captured packets using wireshark and I found images link not be included.)
All programs can use sock5 if you use
Install tsocks, configure
You can try Polly. I believe it supports SOCK5 proxy from what I can see from the preferences but I haven't tried it personally.
To install Polly, you need to add the PPA. You can try the following commands in a terminal to install Polly.