here is screenshot
Edit: I wrote the following before realising that you were asking about boundaries in concept maps. The work around for these is a bit more complex and I'll describe it in another post.
The following is from a reply to a similar question I posted a couple of years ago.
Unlike Xmind, MindManager allows only a single boundary per parent topic or sub-topic which will incorporate all the sub-topics. If you attempt to highlight only a section of subtopics, they will each get their own boundary.
There is however a limited workaround which allows you to achieve the following:
Here the subtopics are actually sub-subtopics. There is actually an "invisible" subtopic for each boundary which is a dummy only with no text or fill colour and a line only for topic shape, which is in the same colour as the sub-subtopic lines. This approach can be applied only at the subtopic level or lower.
Further to my previous post I realised that the work-around I described does not work with concept maps. There is however a slightly more complex version that will work. You will however need MindManager 17.
The steps are as follows:
1. Insert a floating topic in the concept map.
2. Right click the topic and select Format Topic from the context menu. Go to the Subtopics Layout and select Vertical Timeline (if you want a vertical layout as per your example) and click Apply and OK.
3. Insert the sub-topics and add content as required.
4. Highlight the parent topic and insert a boundary. This should include the sub-topics and look something like this, based on your example:
5. Position the parent topic under the concept it is meant to be attached to.
6. You now need to make the parent topic in this group "disappear". Delete any comment then right click and select Format Topic, select No Line under Shape for Floating Topic and select None under Fill.
7. Now draw a Relationship line between the concept topic in the main map and the first sub-topic within the boundary group. Don't worry if the line has several right angles in it - just right click on the line, select Format Relationship from the context menu and choose Straight as the line shape. You should end up with something like this: