You can choose an individual navigation for each space. To do this, select the space you have created, assign it to a menu type and choose the visibility.
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Starting with version 1.0.19 it is possible to define space categories.
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In the space navigation you can hide certain navigational elements for defined user groups from the space navigation. Currently it is possible to hide blogs or the complete navigation sidebar. To hide elements, navigate to the space navigation and select space categories or list spaces where you want to hide navigational elements, the menu type you want to hide and finally the user groups for the visibility blacklist:
Example
Here you can see a space with hidden space navigation panel:
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