Hi Yurdik

The fields marked as company_dependent are transformed internally into old fields.property that relays on ir.property model to store the values and that one only support this types of fields:

'type' : fields.selection([
    ('char', 'Char'),
    ('float', 'Float'),
    ('boolean', 'Boolean'),
    ('integer', 'Integer'),
    ('text', 'Text'),
    ('binary', 'Binary'),
    ('many2one', 'Many2One'),
    ('date', 'Date'),
    ('datetime', 'DateTime'),
    ('selection', 'Selection'),
],'Type', required=True, select=1),

As you see there is no support for One2many or Many2many fields. To do it you could use the combination of the a company_id field on the comodel and an ir.rule record that will restrict the values that you could use in the relation fields depending on the users companies. The record rules will restrict the records for all the users except for admin.