Actually tiff is just a type of file, as .mov .mxf .r3d... it is not what defines the colour space of the info within. And as tiffs can be in 8 or 16bits it means that its 16bits version can have info arranged according to almost every colorspace there is, since cameras do not collect data over 16bits...
Even 8 bits could be log footage, and any colourspace, the problem is the amount of colours it could reproduce with in that colourspace.