ICICI Direct has this feature. It does help a lot with budgeting & segregation of the total margin, into various segments such as Equity, F&O, MTF, Commodities…
Like I say, I want to allot ₹100 to MTF and ₹100 to Equity and ₹100 to F&O and only that much amount will be available for trading in that segment. Helps distribute evenly and prevents spillovers.
A really nice feature, it does help quite a bit with the mental maths and budgeting.