Every checkbox is considered a separate element, grouping is not supported per se in the way you described it above.

CSS wise it'd be possible to address check box blue & checkbox red and change the styling so they would float next to red and green to the left, however the form HTML code contains a <BR/> in between each new form element/label pair – and that <br/> between line 1 red – blue  would need to be removed.

If you're serious about this feature, you could

1. give each <br> an ID,e.g. <br id="brX"/>
2. change the CSS on a per field basis:
• set display:none; for the breaks in-between checkboxes on the same line
• set display:none; for checkbox labels in-between checkboxes on the same line
• adjust the width of the style label.cformlabelafter so you can fit more checkboxes on one line

For item 1 above, I can give you the code pieces if you want to implement it.

Yep, that's supported aleady, see the plugins' Help! page re: multi-select boxes. If that does the trick for you, great, if not I'm sure we'll get working the way I outlined it above.

Let me know either way ;)