Yes, some women can ejaculate during their orgasms, especially if they find the right way how to stimulate their G spot in their vagina. I would recommend you to search some info in google or wikipedia about the location and stimulation of G spot. I am a male, so I can just tell you what works for my girlfriend: it helps when she has something like a small pillow under her bottom during having sex in a position similar to missionary position (but with legs slightly "up" and bent in the knees...) And sometimes before having orgasm some women feel something like a "false need to pee" but it has nothing to do with urine, so do not worry:)
Some girls find it easier to reach it in doggie style position or there are also specially designed vibrators for stimulation of G spot (they are a little bit curved).
haha... i've gotten two girls to ejaculate... one girl once... and another girl up to three times in a row... maybe it just takes longer for some girls, and i dunno the right partner? Or maybe I was just getting better at it, j/k.
The first girl I had just one orgasm with, but I wasn't really passionate about her... The second girl I was completely gaga over so I was giving it my 110%.
If you can ejaculate alone... then you are cabale of doing it... doing it with a partner is a different story