What is proportional allocation?

Lots/Amounts in the group order will be distributed in proportion to the maximum number of lots that can be open on individual participating accounts. Example:

Managed Acct X has Equity = 5,045,175
Managed Acct Y has Equity = 52,383
Group Acct Z – when we open a position for 2 standard lots Acct X gets 2 lost, Acct Y gets 0