It's not any easier or more difficult for me. I'm the same online and off, for the most part. I share a heck of a lot more with people who are close to me offline; and whether I want to share it or not, there's stuff that goes on in my life that those close to me know about just because they have a "close role" in my life and see some things.
Other than the matter of personal/private details, I'm pretty much the same. The only things that ever makes me "edit" my own honesty might be my wish not to insult someone or hurt someone's feelings. I do that online and off (even though I know that in both situations there will always be those time when we inadvertently offend someone). Sometimes, too, I won't say what I'm really thinking for a selfish reason: I don't want someone else thinking I'm a major jerk, and I think if I say what I'd like to that's what they'll think. So, online and off; I do edit but don't out-and-out lie or say what I don't mean.
We may not know who is on the other end of an Internet conversation/chat, but we do know, and have to live with, the person who sits in front of our own screen. As far as offline life and honesty goes, I think it's far more important to be honest in our up-close-and-personal relationships than online; so if I'm not willing to compromise my own honesty online, I'm certainly going to try equally hard not to do that off.
Having said that, I keep a lot of people (and especially strangers) at arms' length as a matter of privacy, protecting myself from "questionable" people, and a sense of appropriate behavior and/or "a time and a place *and a person") for some kinds of conversation. Maybe that's what lets me be equally honest both online and off.