In an ideal case, everything should be double checked with a professional tax adviser or the responsible financial authority for a clear and correct approach of a custody account separation.
We can therefore not make legally binding statements especially for your individual case. However we have designed our system so flexibly that almost every combination is possible.

To achieve depot separation you can, for example, easily connect multiple accounts (in the 'account settings') and also view and manage all the data on your stock exchanges separately. This is not much more elaborate than managing everything in one account. The profits are then summed up for the tax return. 

If you enter everything on a single account you have the possibility to apply filters in each report and to separate everything cleanly for the calculation.

To do this, transactions are assigned to special trade groups. However, this is more complex and requires more practice in our software.
Therefore, the first method is usually recommended.