From a corporate law perspective, the money is being invested into a COMPANY, not a product or portal.
From an investor perspective, they are investing in
NOT in a portal or a product.
As an investor, if you're doing two completely different things with one company, I would be very wary of investing.
Typically one startup == one line of business, one product when you start. Once you cross a few million USD in revenue, you can think of more product lines.
This is more of a corporate structuring question, so a lawyer and your investor are the best people to help you with this.
It is advisable to separate both the portals under two distinct companies if they are different businesses, however, if they are same, you may nest one under the other and raise funds for the mother company.