I have the following code.  Business_Unit_new__c in the User object is the multipicklist.  
I want to pull records from the License Numbers object where the Business Unit (picklist) from the License record is equal to the Business Unit of the current user (multipicklist).  The users may have more than 1 Business Unit assigned to them.

I've tried WHERE Business_Unit__c INCLUDES (:currentuser.Business_Unit_new__c) and it errors saying includes can only be used with a multipick list

If I try 
currentuser.Business_Unit_new__c INCLUDES (:Business_Unit__c) it errors saying it doesn't understand the relationship with currentuser.

How do I fix this?(this is not the complete code, jus tthe snipit that i need the query in)

public with sharing class LicenseList { 
private final License_Numbers__c ln; 
public user currentuser{get;set;} 
public id tobeEdited{get;set;}
public decimal aTotal{get;set;}
public decimal tTotal{get;set;}
public List<AccountWrapper> wrappers{get;set;}
private Integer nextIdent=0;

public LicenseList(ApexPages.StandardSetController controller) { 
currentuser=new User(); 
currentuser=[Select Id, Business_Unit_new__c from User where Id=:userinfo.getuserId()]; 
this.ln = (License_Numbers__c)controller.getRecord(); 

wrappers=new List<AccountWrapper>();
for(Integer idx=0; idx<1; idx++)
{
    wrappers.add(new AccountWrapper(nextIdent++));
}

} 

//------------------------------------------------------------------------------------

public List<License_Numbers__c> lntypes16 = new List<License_Numbers__c>();

public List <License_Numbers__c> getLicenseList(){ 
lntypes16 = [select id, Name, X2016_Cost__c, Business_Unit__c, X2016_Starting_Amount__c, X2016_Subtotal__c, BMS_Code__c, License_Type__c, Monthly_Unit_Price__c, Running_License_Total__c, Org__c FROM License_Numbers__c where Business_Unit__c =:currentuser.Business_Unit_new__c  AND License_Year__c = '2016' ORDER BY Order_Number__c, License_Type__c];
       

return lntypes16; 
}