Nesting Block Variables

[mroptimax]

Is there a way to nest Block-Variables?

I think about a usage like this:

${user}
${username}
${comments}
${text}
${/comments}
${/user}

So i get all user and for each user all comments.
Something like a For Each Loop in another For Each Loop.

[lifenglsf]

same question

[gimler]

My workaround is to first replace user and replace the comment placeholder with comment<i> and than replace the comment<i> blocks