What kind of camo do you have? I've not been in the military so don't know much about it. But I do love and own a few sets of 'military spec' tactical camo/clothing (bought for paintball). I've fallen in love with it, because the construction and material superiority - I have abused them so often and hard, and never a rip or tear.
Anyway, back on topic and getting to the point. It all comes with large warning tags, stating something along the lines of "does not provide thermal detection suppression" or something like that. All the clothing has this tag on it.
Leads me to believe it may be possible? If clothing is warning against it. If clothing has it, it must be special stuff, and advertised as such? Do you have some that is supposed to be? Who makes it and where do you get it? I'd like to see the results of testing it as well. Pretty neat!