Hi
There is Telegram client for MeeGo (meegram2)
ANy way to port this to Symbian?

I am not sure what the base for Symbian S60 but there is no reason to believe it would be as easy as simply porting over the Meego Linux source code and libs. It would likely require a full rewrite and a working S60 SDK maybe dev keys(not sure what the situation was for DIY) to rewrite the code using the Meego source code as a guide.
IDK, maybe there is a S60 chat program which uses libpurple and you could add libpurple telegram and you could hack that in, but I doubt that exists.
It would require you to have Symbian developer skills or paying an old Symbian dev to build it for you. Think of the situation George RR Martin has with a guy maintaining his bespoke 80s experience computer booting straight to dosbox Wordstar.
I am nto sure there is much Symbian experience in this maemo forum, especially nearly ten years after Nodia dumped the already deployed replacement in-house Linux based OS.