Idea portal with Salesforce integration: unique custom field values per request/link

Employees will create ideas on behalf of our customers, via Salesforce.

We need to use custom fields that will get specific values per customer, like: priority, urgency, number of users etc.

For example, we have idea X and filed “priority”.

Idea X is linked to account A with low priority.

Idea X is also linked to account B, this time with high priority

Currently, It is not possible to have fields set per each customer. 

Please add this option.