thank you for your message!
Unfortunately, our Forum Plugin at the Website doesn’t support this at yet. The only way -for now- seems to be to buy a professional plugin. Due to the fact that the SOC is a non profit community (and the money for hosting the website is payed by myself), we are looking for an other solution, but this might take a while.
In the meantime, if you want to get in contact with another member, just send an eMail at email@example.com (=me), and i will ask the other member to contact you directly by mail (i can see your eMail address in the administration tool).
Sorry for that, and hopefully it will help a little bit.