Options for choosing several alternatives in a poll

I have been loving all the polls around on imzy, but there has been a small problem with them for me.

Some times I know exactly which of the alternatives I want to choose, but there are also several times when it's really hard to pick one, because I agree with several of the alternatives. Therefore I wondered if it could be possible to choose several options in the same poll. Maybe the creators of the post can decide a maximum number of alternatives each user can pick, so that in "yes or no" polls, people might only be allowed to choose one, obviously. But in "what of these 50 things do you like", kind of polls maybe each user van be allowed to pick 4 or 5 or whatever the one making the post think is good for that spesific poll?

Or something like that :)